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  • 1. Aaboud, M.
    et al.
    Asimakopoulou, Eleni M.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Bergeås Kuutmann, Elin
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Bokan, Petar
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Brenner, Richard
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Ekelöf, Tord
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Ellert, Mattias
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Ferrari, Arnaud
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Gradin, P. O. Joakim
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Isacson, Max F.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Mårtensson, Mikael U. F.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Sales De Bruin, Pedro
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Zwalinski, L.
    Measurement of the suppression and azimuthal anisotropy of muons from heavy-flavor decays in Pb plus Pb collisions at root s(NN)=2.76 TeV with the ATLAS detector2018Inngår i: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 98, nr 4, artikkel-id 044905Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    ATLAS measurements of the production of muons from heavy-flavor decays in root s(NN) = 2.76 TeV Pb+Pb collisions and root s = 2.76 TeV pp collisions at the LHC are presented. Integrated luminosities of 0.14 nb(-1) and 570 nb(-1) are used for the Pb+Pb and pp measurements, respectively, which are performed over the muon transverse momentum range 4 < pT < 14 GeV and for five Pb+Pb centrality intervals. Backgrounds arising from in-flight pion and kaon decays, hadronic showers, and misreconstructed muons are statistically removed using a template-fitting procedure. The heavy-flavor muon differential cross sections and per-event yields are measured in pp and Pb+Pb collisions, respectively. The nuclear modification factor R-AA obtained from these is observed to be independent of pT, within uncertainties, and to be less than unity, which indicates suppressed production of heavy-flavor muons in Pb+Pb collisions. For the 10% most central Pb+Pb events, the measured R-AA is approximately 0.35. The azimuthal modulation of the heavy-flavor muon yields is also measured and the associated Fourier coefficients v(n) for n = 2, 3, and 4 are given as a function of pT and centrality. They vary slowly with pT and show a systematic variation with centrality which is characteristic of other anisotropy measurements, such as that observed for inclusive hadrons. The measured R-AA and v(n) values are also compared with theoretical calculations.

  • 2. Aaboud, M.
    et al.
    Asimakopoulou, Eleni M.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Bergeås Kuutmann, Elin
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Bokan, Petar
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Brenner, Richard
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Ekelöf, Tord
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Ellert, Mattias
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Ferrari, Arnaud
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Gradin, P. O. Joakim
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Isacson, Max
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Mårtensson, Mikael
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Sales De Bruin, Pedro
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Zwalinski, L.
    Measurement of jet fragmentation in Pb plus Pb and pp collisions at root S-NN=5.02 TeV with the ATLAS detector2018Inngår i: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 98, nr 2, artikkel-id 024908Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This paper presents a measurement of jet fragmentation functions in 0.49 nb(-1) of Pb +Pb collisions and 25 pb(-1) of pp collisions at root S-NN = 5.02 TeV collected in 2015 with the ATLAS detector at the LHC. These measurements provide insight into the jet quenching process in the quark-gluon plasma created in the aftermath of ultrarelativistic collisions between two nuclei. The modifications to the jet fragmentation functions are quantified by dividing the measurements in Pb+Pb collisions by baseline measurements in pp collisions. This ratio is studied as a function of the transverse momentum of the jet, the jet rapidity, and the centrality of the collision. In both collision systems, the jet fragmentation functions are measured for jets with transverse momentum between 126 and 398 GeV and with an absolute value of jet rapidity less than 2.1. An enhancement of particles carrying a small fraction of the jet momentum is observed, which increases with centrality and with increasing jet transverse momentum. Yields of particles carrying a very large fraction of the jet momentum are also observed to be enhanced. Between these two enhancements of the fragmentation functions a suppression of particles carrying an intermediate fraction of the jet momentum is observed in Pb+Pb collisions. A small dependence of the modifications on jet rapidity is observed.

  • 3. Aaboud, M.
    et al.
    Bergeås, Elin Kuutmann
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Brenner, Richard
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Ekelöf, Tord
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Ellert, Mattias
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Ferrari, Arnaud
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Gradin, P.O. Joakim
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Madsen, Alexander
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Öhman, Henrik
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Rangel-Smith, Camilla
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Zwalinski, L.
    Measurements of long-range azimuthal anisotropies and associated Fourier coefficients for pp collisions at root s=5.02 and 13 TeV and p plus Pb collisions at root(NN)-N-s=5.02 TeV with the ATLAS detector2017Inngår i: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, nr 2, artikkel-id 024908Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    ATLAS measurements of two-particle correlations are presented for root s = 5.02 and 13 TeV pp collisions and for root(NN)-N-s = 5.02 TeV p + Pb collisions at the LHC. The correlation functions are measured as a function of relative azimuthal angle Delta phi, and pseudorapidity separation Delta eta, using charged particles detected within the pseudorapidity interval |eta| < 2.5. Azimuthal modulation in the long-range component of the correlation function, with | Delta eta| > 2, is studied using a template fitting procedure to remove a "back-to-back" contribution to the correlation function that primarily arises from hard-scattering processes. In addition to the elliptic, cos(2 Delta phi), modulation observed in a previous measurement, the pp correlation functions exhibit significant cos(3 Delta phi) and cos(4 Lambda phi) modulation. The Fourier coefficients v(n),(n) associated with the cos (n Lambda phi) modulation of the correlation functions for n = 2-4 are measured as a function of charged-particle multiplicity and charged-particle transverse momentum. The Fourier coefficients are observed to be compatible with cos(n phi) modulation of per-event singleparticle azimuthal angle distributions. The single-particle Fourier coefficients vn are measured as a function of charged-particle multiplicity, and charged-particle transverse momentum for n = 2-4. The integrated luminosities used in this analysis are, 64 nb(-1) for the root s = 13 TeV pp data, 170 nb(-1) for the root s = 5.02 TeV pp data, and 28 nb(-1) for the root(NN)-N-s = 5.02 TeV p + Pb data.

  • 4. Aaboud, M.
    et al.
    Bergeås Kuutmann, Elin
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Bokan, Peter
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Brenner, Richard
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Ekelöf, Tord
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Ellert, Mattias
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Ferrari, Arnaud
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Gradin, P.O. Joakim
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Madsen, Alexander
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Öhman, Henrik
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Rangel-Smith, Camilla
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    De Bruin, Pedro Sales
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
    Zwalinski, L.
    Femtoscopy with identified charged pions in proton-lead collisions at root s(NN)=5.02 TeV with ATLAS2017Inngår i: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, nr 6, artikkel-id 064908Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Bose-Einstein correlations between identified charged pions are measured for p+Pb collisions at root s(NN) = 5.02 TeV using data recorded by the ATLAS detector at the CERN Large Hadron Collider corresponding to a total integrated luminosity of 28 nb(-1). Pions are identified using ionization energy loss measured in the pixel detector. Two-particle correlation functions and the extracted source radii are presented as a function of collision centrality as well as the average transverse momentum (k(T)) and rapidity (y*(pi pi)) of the pair. Pairs are selected with a rapidity -2 < y*(pi pi) < 1 and with an average transverse momentum 0.1 < k(T) < 0.8 GeV. The effect of jet fragmentation on the two-particle correlation function is studied, and a method using opposite-charge pair data to constrain its contributions to the measured correlations is described. The measured source sizes are substantially larger in more central collisions and are observed to decrease with increasing pair k(T). A correlation of the radii with the local charged-particle density is demonstrated. The scaling of the extracted radii with the mean number of participating nucleons is also used to compare a selection of initial-geometry models. The cross term R-ol is measured as a function of rapidity, and a nonzero value is observed with 5.1 sigma combined significance for -1 < y*pi pi < 1 in the most central events.

  • 5.
    Adlarson, Patrik
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Augustyniak, W.
    Natl Ctr Nucl Res, Div Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Bashkanov, M.
    Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England.
    Bergmann, F. S.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Berlowski, M.
    Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bondar, A.
    RAS, SB, Budker Inst Nucl Phys, 11 Acad Lavrentieva Pr, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Buescher, M.
    Forschungszentrum Julich, Peter Grunberg Inst, PGI 6 Elekt Eigenschaften, D-52425 Julich, Germany;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany.
    Calén, Hans
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Clement, H.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Demmich, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Erven, A.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Erven, W.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Natl Res Ctr Kurchatov Inst, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya Str, Moscow 117218, Russia.
    Foehl, K.
    Justus Liebig Univ Giessen, Inst Phys 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany.
    Fransson, Kjell
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Indian Inst Technol Indore, Discipline Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Natl Res Ctr Kurchatov Inst, High Energy Phys Div, Petersburg Nucl Phys Inst, 1 Mkr Orlova roshcha, Gatchina 188300, Leningradskaya, Russia.
    Heijkenskjöld, Lena
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Huesken, N.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Johansson, Tord
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kemmerling, G.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Khoukaz, A.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kleines, H.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Ul 75 Pulku Piechoty 1, PL-41500 Chorzow, Poland.
    Krzemien, W.
    Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Kupsc, Andrzej
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik. Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, JLN Marg, Jaipur 302017, Rajasthan, India.
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Florida State Univ, Dept Phys, 77 Chieftan Way, Tallahassee, FL 32306 USA.
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Marciniewski, Pawel
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Marianski, B.
    Natl Ctr Nucl Res, Div Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Parol, W.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Ist Nazl Fis Nucl, Lab Nazl Frascati, Via E Fermi 40, I-00044 Frascati, Italy.
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Pszczel, Damian
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik. Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.
    Roy, A.
    Indian Inst Technol Indore, Discipline Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sawant, S.
    Indian Inst Technol, Dept Phys, Mumbai 400076, Maharashtra, India.
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Shwartz, B.
    RAS, SB, Budker Inst Nucl Phys, 11 Acad Lavrentieva Pr, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Tomsk State Univ, Dept Phys, 36 Lenin Ave, Tomsk 634050, Russia.
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sopov, V.
    Natl Res Ctr Kurchatov Inst, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya Str, Moscow 117218, Russia.
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stepaniak, J.
    Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Ul 75 Pulku Piechoty 1, PL-41500 Chorzow, Poland.
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Trzcinski, A.
    Natl Ctr Nucl Res, Div Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Wolke, Magnus
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Wuestner, P.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan.
    Zabierowski, J.
    Natl Ctr Nucl Res, Div Astrophys, Box 447, PL-90950 Lodz, Poland.
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Zlomanczuk, Jozef
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Zupranski, P.
    Natl Ctr Nucl Res, Div Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Examination of the production of an isotensor dibaryon in the pp -> pp pi(+)pi(-) reaction2019Inngår i: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 99, nr 2, artikkel-id 025201Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The quasifree pp -> pp pi(+)pi(-) reaction has been measured by means of pd collisions at T-p = 1.2 GeV using the WASA detector setup at COSY enabling exclusive and kinematically complete measurements. Total and differential cross sections have been extracted for the energy region T-p = 1.08-1.36 GeV (root s = 2.35-2.46 GeV) covering thus the regions of N* (1440 ) and Delta(1232)Delta(1232) resonance excitations. Calculations describing these excitations by t-channel meson exchange as well as isospin relations based on the pp -> pp pi(0)pi(0) data underpredict substantially the measured total cross section. The calculations are also at variance with specific experimental differential cross sections. An isotensor Delta N dibaryon resonance with I(J(P)) = 2(1(+) ) produced associatedly with a pion is able to overcome these deficiencies. Such a dibaryon was predicted by Dyson and Xuong [Phys. Rev. Lett. 13, 815 (1964)] and more recently calculated by A. Gal and H. Garcilazo [Nucl. Phys. A 928, 73 (2014)].

  • 6.
    Davies, P. J.
    et al.
    Univ York, York YO10 5DD, N Yorkshire, England.
    Park, J.
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada;Univ British Columbia, Vancouver, BC V6T 1Z1, Canada;Lund Univ, Dept Phys, S-22100 Lund, Sweden.
    Grawe, H.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany.
    Wadsworth, R.
    Univ York, York YO10 5DD, N Yorkshire, England.
    Gernhauser, R.
    Tech Univ Munich, D-85748 Garching, Germany.
    Krucken, R.
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada;Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
    Nowacki, F.
    Univ Strasbourg, F-67037 Strasbourg, France.
    Ahn, D. S.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Ameil, F.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany.
    Baba, H.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Bäck, T.
    Royal Inst Technol, SE-10691 Stockholm, Sweden.
    Blank, B.
    Ctr Etud Nucl Bordeaux Gradignan, 19 Chemin Solarium,CS 10120, F-33175 Gradignan, France.
    Blazhev, A.
    Univ Cologne, D-50937 Cologne, Germany.
    Boutachkov, P.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany;Tech Univ Darmstadt, D-64289 Darmstadt, Germany.
    Browne, F.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan;Univ Brighton, Brighton BN2 4GJ, E Sussex, England.
    Celikovic, I
    CEA, DSM, CNRS, IN2P3,GANIL, Blvd H Becquerel, F-14076 Caen, France;Univ Belgrade, Belgrade 11000, Serbia.
    Dewald, M.
    Univ Cologne, D-50937 Cologne, Germany.
    Doornenbal, P.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Faestermann, T.
    Tech Univ Munich, D-85748 Garching, Germany.
    Fang, Y.
    Osaka Univ, 1-1 Machikaneyama Machi, Osaka, Toyonaka 5600043, Japan.
    de France, G.
    CEA, DSM, CNRS, IN2P3,GANIL, Blvd H Becquerel, F-14076 Caen, France.
    Fukuda, N.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Gengelbach, Aila
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Gerl, J.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany.
    Giovinazzo, J.
    Ctr Etud Nucl Bordeaux Gradignan, 19 Chemin Solarium,CS 10120, F-33175 Gradignan, France.
    Go, S.
    Univ Tokyo, Bunkyo Ku, Tokyo 1130033, Japan.
    Goel, N.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany;Tech Univ Darmstadt, D-64289 Darmstadt, Germany.
    Gorska, M.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany.
    Gregor, E.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany;Tech Univ Darmstadt, D-64289 Darmstadt, Germany.
    Hotaka, H.
    Tokyo Univ Sci, Dept Phys, Noda, Chiba 2788510, Japan.
    Ilieva, S.
    Tech Univ Darmstadt, D-64289 Darmstadt, Germany.
    Inabe, N.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Isobe, T.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Jenkins, D. G.
    Univ York, York YO10 5DD, N Yorkshire, England.
    Jolie, J.
    Univ Cologne, D-50937 Cologne, Germany.
    Jung, H. S.
    Univ Tokyo, Bunkyo Ku, Tokyo 1130033, Japan.
    Jungclaus, A.
    CSIC, Inst Estruct Mat, E-28006 Madrid, Spain.
    Kameda, D.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Kim, G. D.
    Inst for Basic Sci Korea, Rare Isotope Sci Project, Daejeon 305811, South Korea.
    Kim, Y-K
    Inst for Basic Sci Korea, Rare Isotope Sci Project, Daejeon 305811, South Korea.
    Kojouharov, I
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany.
    Kubo, T.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Kurz, N.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany.
    Lewitowicz, M.
    CEA, DSM, CNRS, IN2P3,GANIL, Blvd H Becquerel, F-14076 Caen, France.
    Lorusso, G.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan;Natl Phys Lab, Acoust & Ionizing Radiat Div, Teddington TW11 0LW, Middx, England;Univ Surrey, Guildford GU2 7XH, Surrey, England.
    Lubos, D.
    Tech Univ Munich, D-85748 Garching, Germany;RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Maier, L.
    Tech Univ Munich, D-85748 Garching, Germany.
    Merchan, E.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany;Tech Univ Darmstadt, D-64289 Darmstadt, Germany.
    Moschner, K.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan;Univ Cologne, D-50937 Cologne, Germany.
    Murai, D.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Naqvi, F.
    Yale Univ, New Haven, CT 06511 USA.
    Nishibata, H.
    Osaka Univ, 1-1 Machikaneyama Machi, Osaka, Toyonaka 5600043, Japan.
    Nishimura, D.
    Tokyo City Univ, Setagaya Ku, Tokyo 1588557, Japan.
    Nishimura, S.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Nishizuka, I
    Tohoku Univ, Sendai, Miyagi 9800845, Japan.
    Patel, Z.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan;Univ Surrey, Guildford GU2 7XH, Surrey, England.
    Pietralla, N.
    Tech Univ Darmstadt, D-64289 Darmstadt, Germany.
    Rajabali, M. M.
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada.
    Rice, S.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan;Univ Surrey, Guildford GU2 7XH, Surrey, England.
    Sakurai, H.
    Univ Tokyo, Bunkyo Ku, Tokyo 1130033, Japan.
    Schaffner, H.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany.
    Shimizu, Y.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Sinclair, L. F.
    Univ York, York YO10 5DD, N Yorkshire, England;RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Soederstroem, P-A
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany;RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Steiger, K.
    Tech Univ Munich, D-85748 Garching, Germany.
    Sumikama, T.
    Tohoku Univ, Sendai, Miyagi 9800845, Japan.
    Suzuki, H.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Takeda, H.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Taprogge, J.
    CSIC, Inst Estruct Mat, E-28006 Madrid, Spain.
    Thöle, P.
    Univ Cologne, D-50937 Cologne, Germany.
    Valder, S.
    Univ York, York YO10 5DD, N Yorkshire, England.
    Wang, Z.
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada.
    Warr, N.
    Univ Cologne, D-50937 Cologne, Germany.
    Watanabe, H.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan;Beihang Univ, Beijing 100191, Peoples R China.
    Werner, V
    Tech Univ Darmstadt, D-64289 Darmstadt, Germany;Yale Univ, New Haven, CT 06511 USA.
    Wu, J.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan;Peking Univ, Beijing 100871, Peoples R China.
    Xu, Z. Y.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Yagi, A.
    Osaka Univ, Ibaraki, Osaka 5670047, Japan.
    Yoshinaga, K.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Zhu, Y.
    Tokyo Univ Sci, Noda, Chiba 2788510, Japan.
    Toward the limit of nuclear binding on the N = Z line: Spectroscopy of Cd-962019Inngår i: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 99, nr 2, artikkel-id 021302Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A gamma -decaying isomeric state (tau(1/2) = 197(-17)(+19) ns) has been identified in Cd-96, which is one alpha particle away from the last known bound N = Z nucleus, Sn-100. Comparison of the results with shell-model calculations has allowed a tentative experimental level scheme to be deduced and the isomer to be interpreted as a medium-spin negative-parity spin trap based on the coupling of isoscalar (T = 0) and isovector (T = 1) neutron-proton pairs. The data also suggest evidence for the population of a 9(+) T = 1 state, which is predicted by shell-model calculations to be yrast. Such a low-lying T = 1 state, which is unknown in lighter mass even-even self-conjugate nuclei, can also be interpreted in terms of the coupling of T = 0 and T = 1 neutron-proton pairs.

  • 7.
    Fäldt, Göran
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Wilkin, C.
    UCL, Phys & Astron Dept, Gower St, London WC1E 6BT, England..
    Phenomenological study of the pp -> pi(+) pn reaction2018Inngår i: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, nr 2, artikkel-id 025201Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Fully constrained bubble chamber data on the pp -> pi(+) pn and pp -> pi(+) d reactions are used to investigate the ratio of the counting rates for the two processes as function of the pn excitation energy Q. Though it is important to include effects associated with the p-wave nature of pion production, the data are insufficient to establish unambiguously the dependence on Q. The angular distributions show the presence of higher partial waves which seem to be anomalously large at small Q. The dispersion relation method to determine scattering lengths is extended to encompass cases where, as for the pp -> pi(+) pn reaction, there is a bound state and, in a test example, it is shown that the values deduced for the low-energy neutron-proton scattering parameters are significantly influenced by the pion p-wave behavior.

  • 8.
    Hadynska-Klek, K.
    et al.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland.;Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland.;Univ Oslo, Dept Phys, N-0316 Oslo, Norway.;INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy.;Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England..
    Napiorkowski, P. J.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Zielinska, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland.;Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Srebrny, J.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Maj, A.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Azaiez, F.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Dobon, J. J. Valiente
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Kicinska-Habior, M.
    Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland..
    Nowacki, F.
    Univ Strasbourg, IPHC, CNRS, UMR7178, 23 Rue Loess, F-67037 Strasbourg, France..
    Naidja, H.
    Univ Strasbourg, IPHC, CNRS, UMR7178, 23 Rue Loess, F-67037 Strasbourg, France.;GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.;Univ Constantine 1, LPMS, Route Ain El Bey, Constantine 25000, Algeria..
    Bounthong, B.
    Univ Strasbourg, IPHC, CNRS, UMR7178, 23 Rue Loess, F-67037 Strasbourg, France..
    Rodriguez, T. R.
    Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain..
    de Angelis, G.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Abraham, T.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Kumar, G. Anil
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Bazzacco, D.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Bellato, M.
    INFN Sez Padova, I-35131 Padua, Italy..
    Bortolato, D.
    INFN Sez Padova, I-35131 Padua, Italy..
    Bednarczyk, P.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Benzoni, G.
    INFN Sez Milano, I-20133 Milan, Italy..
    Berti, L.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Birkenbach, B.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Bruyneel, B.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Brambilla, S.
    INFN Sez Milano, I-20133 Milan, Italy..
    Camera, F.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Chavas, J.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Cederwall, B.
    Royal Inst Technol, Dept Phys, SE-10691 Stockholm, Sweden..
    Charles, L.
    Univ Strasbourg, IPHC, CNRS, UMR7178, 23 Rue Loess, F-67037 Strasbourg, France..
    Ciemala, M.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Cocconi, P.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Coleman-Smith, P.
    Daresbury Lab, Warrington WA4 4AD, Cheshire, England..
    Colombo, A.
    INFN Sez Padova, I-35131 Padua, Italy..
    Corsi, A.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Crespi, F. C. L.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Cullen, D. M.
    Univ Manchester, Sch Phys & Astron, Schuster Lab, Manchester M13 9PL, Lancs, England..
    Czermak, A.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Desesquelles, P.
    Univ Paris 11, F-91400 Orsay, France.;CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Doherty, D. T.
    Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England.;Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France.;Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England..
    Dulny, B.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Eberth, J.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Farnea, E.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Fornal, B.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Franchoo, S.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Gadea, A.
    Univ Valencia, CSIC, Inst Fis Corpuscular IFIC, S-46980 Valencia, Spain..
    Giaz, A.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Gottardo, A.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Grave, X.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Grebosz, J.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Gorgen, A.
    Univ Oslo, Dept Phys, N-0316 Oslo, Norway..
    Gulmini, M.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Habermann, T.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Hess, H.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Isocrate, R.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Iwanicki, J.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Jaworski, G.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Judson, D. S.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Jungclaus, A.
    CSIC, Inst Estruct Mat, E-28006 Madrid, Spain..
    Karkour, N.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Kmiecik, M.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Karpinski, D.
    Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland..
    Kisielinski, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Kondratyev, N.
    Flerov Lab Nucl React JINR, RU-141980 Dubna, Russia..
    Korichi, A.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Komorowska, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland.;Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland..
    Kowalczyk, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Korten, W.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Krzysiek, M.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland.;Horia Hulubei Natl Inst Phys & Nucl Engn, ELI NP, Magurele 077125, Romania..
    Lehaut, G.
    Univ Lyon 1, CNRS, IN2P3, IPN Lyon, F-69622 Villeurbanne, France..
    Leoni, S.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Ljungvall, J.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Lopez-Martens, A.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Lunardi, S.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Maron, G.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Mazurek, K.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Menegazzo, R.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Mengoni, D.
    INFN Sez Padova, I-35131 Padua, Italy..
    Merchan, E.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.;Tech Univ Darmstadt, D-64289 Darmstadt, Germany..
    Meczynski, W.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Michelagnoli, C.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Million, B.
    INFN Sez Milano, I-20133 Milan, Italy..
    Myalski, S.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Napoli, D. R.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Niikura, M.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Obertelli, A.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Ozmen, S. F.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Palacz, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Prochniak, L.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Pullia, A.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Quintana, B.
    Univ Salamanca, Dept Fis Fundamental, Lab Radiac Ionizantes, Salamanca, Spain..
    Rampazzo, G.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Recchia, F.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Redon, N.
    Univ Lyon 1, CNRS, IN2P3, IPN Lyon, F-69622 Villeurbanne, France..
    Reiter, P.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Rosso, D.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Rusek, K.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Sahin, E.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Salsac, M-D
    Söderström, Pär-Anders
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Stefan, I.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Stezowski, O.
    Univ Lyon 1, CNRS, IN2P3, IPN Lyon, F-69622 Villeurbanne, France..
    Styczen, J.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Theisen, Ch.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Toniolo, N.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Ur, C. A.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Wadsworth, R.
    Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England..
    Wasilewska, B.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Wiens, A.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Wood, J. L.
    Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA..
    Wrzosek-Lipska, K.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Zieblinski, M.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Quadrupole collectivity in Ca-42 from low-energy Coulomb excitation with AGATA2018Inngår i: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, nr 2, artikkel-id 024326Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    ACoulomb-excitation experiment to study electromagnetic properties of Ca-42 was performed using a 170-MeV calcium beam from the TANDEM XPU facility at INFN Laboratori Nazionali di Legnaro. gamma rays from excited states in Ca-42 were measured with the AGATA spectrometer. The magnitudes and relative signs of ten E2 matrix elements coupling six low-lying states in Ca-42, including the diagonal E2 matrix elements of 2(1)(+) and 2(2)(+) states, were determined using the least-squares code GOSIA. The obtained set of reduced E2 matrix elements was analyzed using the quadrupole sum rule method and yielded overall quadrupole deformation for 0(1),(+)(2) and 2(1,2)(+) states, as well as triaxiality for 0(1,2)(+) states, establishing the coexistence of a weakly deformed ground-state band and highly deformed slightly triaxial sideband in Ca-42. The experimental results were compared with the state-of-the-art large-scale shell-model and beyond-mean-field calculations, which reproduce well the general picture of shape coexistence in Ca-42.

  • 9.
    John, P. R.
    et al.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany..
    Valiente-Dobon, J. J.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Mengoni, D.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Modamio, V.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy.;Univ Oslo, Dept Phys, POB 1048 Blindern, N-0316 Oslo, Norway..
    Lunardi, S.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Bazzacco, D.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Gadea, A.
    Univ Valencia, CSIC, Inst Fis Corpuscular, E-46980 Valencia, Spain..
    Wheldon, C.
    Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England..
    Rodriguez, T. R.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany.;Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain..
    Alexander, T.
    Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England..
    de Angelis, G.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Ashwood, N.
    Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England..
    Barr, M.
    Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England..
    Benzoni, G.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy..
    Birkenbach, B.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Bizzeti, P. G.
    Univ Firenze, Dipartimento Fis, I-50019 Florence, Italy.;Ist Nazl Fis Nucl, Sez Firenze, I-50019 Florence, Italy..
    Bizzeti-Sona, A. M.
    Univ Firenze, Dipartimento Fis, I-50019 Florence, Italy.;Ist Nazl Fis Nucl, Sez Firenze, I-50019 Florence, Italy..
    Bottoni, S.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy.;Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA..
    Bowry, M.
    Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England..
    Bracco, A.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy..
    Browne, F.
    Univ Brighton, Sch Comp Engn & Math, Brighton BN2 4GJ, E Sussex, England..
    Bunce, M.
    Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England..
    Camera, F.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy..
    Corradi, L.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Crespi, F. C. L.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy..
    Melon, B.
    Univ Firenze, Dipartimento Fis, I-50019 Florence, Italy.;Ist Nazl Fis Nucl, Sez Firenze, I-50019 Florence, Italy..
    Farnea, E.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Fioretto, E.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Gottardo, A.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy.;IN2P3, CNRS, CSNSM, Orsay Campus, F-91405 Orsay, France.;Univ Paris 11, Orsay Campus, F-91405 Orsay, France..
    Grente, L.
    Ctr CEA Saclay, CEA, DSM, Inst Rech Lois Fondament Univers IRFU, F-91191 Gif Sur Yvette, France..
    Hess, H.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Kokalova, Tz.
    Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England..
    Korten, W.
    Ctr CEA Saclay, CEA, DSM, Inst Rech Lois Fondament Univers IRFU, F-91191 Gif Sur Yvette, France..
    Kusoglu, A.
    Istanbul Univ, Fac Sci, Dept Phys, TR-34134 Istanbul, Turkey.;Horia Hulubei Natl Inst Phys & Nucl Engn, ELI, NP, Magurele 077125, Romania..
    Lenzi, S.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Leoni, S.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy..
    Ljungvall, J.
    IN2P3, CNRS, CSNSM, Orsay Campus, F-91405 Orsay, France.;Univ Paris 11, Orsay Campus, F-91405 Orsay, France..
    Menegazzo, R.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Michelagnoli, C.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;CEA, DSM, CNRS, IN2P3,GANIL, F-14076 Caen, France..
    Mijatovic, T.
    Inst Ruder Boskovic, HR-10000 Zagreb, Croatia..
    Montagnoli, G.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Montanari, D.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Strasbourg, USIAS, IPHC, CNRS, F-67037 Strasbourg 2, France..
    Napoli, D. R.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Podolyak, Zs.
    Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England..
    Pollarolo, G.
    Univ Torino, Dipartimento Fis Teor, I-10125 Turin, Italy.;Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy..
    Recchia, F.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Reiter, P.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Roberts, O. J.
    Univ Brighton, Sch Comp Engn & Math, Brighton BN2 4GJ, E Sussex, England.;Univ York, York YO10 5DD, N Yorkshire, England..
    Sahin, E.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy.;Univ Oslo, Dept Phys, POB 1048 Blindern, N-0316 Oslo, Norway..
    Salsac, M. -D
    Scarlassara, F.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Sferrazza, M.
    Univ Libre Bruxelles, Dept Phys, B-1050 Brussels, Belgium..
    Soderstrom, Pär-Anders
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Kärnfysik.
    Stefanini, A. M.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Szilner, S.
    IN2P3, CNRS, CSNSM, Orsay Campus, F-91405 Orsay, France.;Univ Paris 11, Orsay Campus, F-91405 Orsay, France..
    Ur, C. A.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Extreme Light Infrastruct Nucl Phys Facil, MG-6, Bucharest, Romania..
    Vogt, A.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Walshe, J.
    Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England..
    In-beam gamma-ray spectroscopy of the neutron-rich platinum isotope Pt-200 toward the N=126 shell gap2017Inngår i: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 95, nr 6, artikkel-id 064321Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The neutron-rich nucleus Pt-200 is investigated via in-beam gamma-ray spectroscopy to study the shape evolution in the neutron-rich platinum isotopes towards the N = 126 shell closure. The two-neutron transfer reaction Pt-198(Se-82, Se-80)Pt-200 is used to populate excited states of Pt-200. The Advanced Gamma Ray Tracking Array (AGATA) demonstrator coupled with the PRISMA spectrometer detects gamma rays coincident with the Se-80 recoils, the binary partner of Pt-200. The binary partner method is applied to extract the gamma-ray transitions and build the level scheme of Pt-200. The level at 1884 keV reported by Yates et al. [S. W. Yates, E. M. Baum, E. A. Henry, L. G. Mann, N. Roy, A. Aprahamian, R. A. Meyer, and R. Estep, Phys. Rev. C 37, 1889 (1988)] was confirmed to be at 1882.1 keV and assigned as the (6(1)(+)) state. An additional gamma ray was found and it presumably deexcites the (8(1)(+)) state. The results are compared with state-of-the-art beyond mean-field calculations, performed for the even-even Pt190-204 isotopes, revealing that Pt-200 marks the transition from the gamma-unstable behavior of lighter Pt nuclei towards a more spherical one when approaching the N = 126 shell closure.

  • 10.
    Psaltis, A.
    et al.
    Univ Athens, Dept Phys, Zografou Campus, GR-15784 Athens, Greece;McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada.
    Khaliel, A.
    Univ Athens, Dept Phys, Zografou Campus, GR-15784 Athens, Greece.
    Asimakopoulou, Eleni M.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik. Univ Athens, Dept Phys, Zografou Campus, GR-15784 Athens, Greece.
    Kanellakopoulos, A.
    Univ Athens, Dept Phys, Zografou Campus, GR-15784 Athens, Greece;Katholieke Univ Leuven, Inst Kern Stralingsfys, Celestijnenlaan 200D, B-3001 Leuven, Belgium.
    Lagald, V
    Univ Athens, Dept Phys, Zografou Campus, GR-15784 Athens, Greece;CERN, Geneva, Switzerland.
    Lykiardopoulou, M.
    Univ Athens, Dept Phys, Zografou Campus, GR-15784 Athens, Greece;Univ British Columbia, Dept Phys & Astron, 6224 Agr Rd, Vancouver, BC V6T 1Z1, Canada.
    Malami, E.
    Univ Athens, Dept Phys, Zografou Campus, GR-15784 Athens, Greece;Nikhef, Sci Pk 105, NL-1098 XG Amsterdam, Netherlands.
    Tsavalas, P.
    Univ Athens, Dept Phys, Zografou Campus, GR-15784 Athens, Greece;NCSR Demokritos, INRASTES, GR-15310 Aghia Paraskevi, Greece.
    Zyriliou, A.
    Univ Athens, Dept Phys, Zografou Campus, GR-15784 Athens, Greece.
    Mertzimekis, T. J.
    Univ Athens, Dept Phys, Zografou Campus, GR-15784 Athens, Greece.
    Cross-section measurements of radiative proton-capture reactions in Cd-112 at energies of astrophysical interest2019Inngår i: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 99, nr 6, artikkel-id 065807Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Reactions involving the group of nuclei commonly known as p nuclei are part of the nucleosynthetic mechanisms at astrophysical sites. The In-113 nucleus is such a case with several open questions regarding its origin at extreme stellar environments. In this paper, the experimental study of the cross sections of the radiative proton-capture reaction Cd-112(p, gamma)In-113 is attempted for the first time at energies lying inside the Gamow window with an isotopically enriched Cd-112 target. Two different techniques, the in-beam gamma-ray spectroscopy and the activation method, have been applied. The latter method is required to account for the presence of a low-lying In-113 isomer at 392 keV having a half-life of approximate to 100 min. From the cross sections, the astrophysical S factors and the isomeric ratios have been additionally deduced. The experimental results are compared to detailed Hauser-Feshbach theoretical calculations using TALYS and discussed in terms of their significance to the optical model potential involved.

  • 11.
    Rakopoulos, Vasileios
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Tillämpad kärnfysik.
    Lantz, Mattias
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Tillämpad kärnfysik.
    Solders, Andreas
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Tillämpad kärnfysik.
    Al-Adili, Ali
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Tillämpad kärnfysik.
    Mattera, Andrea
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Tillämpad kärnfysik.
    Canete, L.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
    Eronen, T.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
    Gorelov, D.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
    Jokinen, A.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
    Kankainen, A.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
    Kolhinen, V. S.
    Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA;Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
    Moore, I. D.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
    Nesterenko, D. A.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
    Penttila, H.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
    Pohjalainen, I.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
    Rinta-Antila, S.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
    Simutkin, Vasily
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Tillämpad kärnfysik.
    Vilen, M.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
    Voss, A.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
    Pomp, Stephan
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Tillämpad kärnfysik.
    First isomeric yield ratio measurements by direct ion counting and implications for the angular momentum of the primary fission fragments2018Inngår i: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 98, nr 2, artikkel-id 024612Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We report the first experimental determination of independent isomeric yield ratios using direct ion counting with a Penning trap, which offered such a high resolution in mass that isomeric states could be separated. The measurements were performed at the Ion Guide Isotope Separator On-Line (IGISOL) facility at the University of Jyvaskyla. The isomer production ratios of Ge-81, Y-96,Y-97 Sn-128(,1)30, and Sb-129 in the 25-MeV proton-induced fission of U-na(t) and Th-232 were studied. Three isomeric pairs (Ge-81, Y-96, and Sb-129) were measured for the first time for the U-na(t)(p, f) reaction, while all the reported yield ratios for the Th-232(p, f) reaction were determined for the first time. The comparison of the experimentally determined isomeric yield ratios with data available in the literature shows a reasonable agreement, except for the case of Sn-130 for unspecified reasons. The obtained results were also compared with the GEF model, where good agreement can be noticed in most cases for both reactions. Serious discrepancies can only be observed for the cases of Y-96(,)97 for both reactions. Moreover, based on the isomeric yield ratios, the root-mean-square angular momenta (J(r)(ms)) of the fission fragments after scission were estimated using the TALYS code. The experimentally determined isomeric yield ratios, and consequently the deduced J(rms), for Sn-130 are significantly lower compared to Sn-128 for both fissioning systems. This can be attributed to the more spherical shape of the fragments that contribute to the formation of Sn-130, due to their proximity to the N = 82 shell closure. The values of J(rms) for Sb-129 are higher than Sn-128 for both reactions, despite the same neutron number of both nuclides (N = 78), indicating the odd-Z effect where fission fragments with odd-Z number tend to bear larger angular momentum than even-Z fragments. The isomer production ratio for the isotopes of Sn is more enhanced in the U-na(t)(p, f) reaction than in Th-232(p, f). The opposite is observed for Y-96 and Y-97. These discrepancies might be associated to different scission shapes of the fragments for the two fission reactions, indicating the impact that the different fission modes can have on the isomeric yield ratios.

  • 12.
    Wamers, F.
    et al.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.;Inst Kernphys Tech Univ, D-64289 Darmstadt, Germany..
    Marganiec, J.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.;Inst Kernphys Tech Univ, D-64289 Darmstadt, Germany.;EMMI, ExtreMe Matter Inst, D-64291 Darmstadt, Germany..
    Aksouh, F.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.;King Saud Univ, Coll Sci, Phys & Astron Dept, SA-2455 Riyadh, Saudi Arabia..
    Aksyutina, Yu.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Alvarez-Pol, H.
    Aumann, T.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.;Inst Kernphys Tech Univ, D-64289 Darmstadt, Germany..
    Beceiro-Novo, S.
    Univ Santiago de Compostela, Dept Fis Particulas, ES-15782 Santiago De Compostela, Spain..
    Bertulani, C. A.
    Texas A&M Univ, Dept Phys & Astron, Commerce, TX 75429 USA..
    Boretzky, K.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Borge, M. J. G.
    CSIC, Inst Estruct Mat, ES-28006 Madrid, Spain..
    Chartier, M.
    Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England..
    Chatillon, A.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Chulkov, L. V.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.;NRC Kurchatov Inst, RU-123182 Moscow, Russia..
    Cortina-Gil, D.
    Univ Santiago de Compostela, Santiago De Compostela 15782, Spain..
    Emling, H.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Ershova, O.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.;Goethe Univ, Inst Angew Phys, D-60438 Frankfurt, Germany..
    Fraile, L. M.
    Univ Complutense Madrid, Dept Atom Mol & Nucl Phys, ES-28040 Madrid, Spain..
    Fynbo, H. O. U.
    Univ Aarhus, Dept Phys & Astron, DK-8000 Aarhus, Denmark..
    Galaviz, D.
    Geissel, H.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Heil, M.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Hoffmann, D. H. H.
    Hoffman, J.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Johansson, H. T.
    Chalmers Tekn Hgsk, Fys Inst, SE-41296 Gothenburg, Sweden..
    Jonson, B.
    Chalmers Tekn Hgsk, Fys Inst, SE-41296 Gothenburg, Sweden..
    Karagiannis, C.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Kiselev, O. A.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Kratz, J. V.
    Johannes Gutenberg Univ Mainz, Inst Kernchem, D-55122 Mainz, Germany..
    Kulessa, R.
    Uniwersytet Jagellonski, Inst Fis, PL-30059 Krakow, Poland..
    Kurz, N.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Langer, C.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Lantz, Mattias
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Tillämpad kärnfysik.
    Le Bleis, T.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Lehr, C.
    Lemmon, R.
    STFC Daresbury Lab, Nucl Phys Grp, Warrington WA4 4AD, Cheshire, England..
    Litvinov, Yu. A.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Mahata, K.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Muentz, C.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Nilsson, T.
    Nociforo, C.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Ott, W.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Panin, V.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.;Inst Kernphys Tech Univ, D-64289 Darmstadt, Germany..
    Paschalis, S.
    Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England..
    Perea, A.
    Plag, R.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Reifarth, R.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Richter, A.
    Inst Kernphys Tech Univ, D-64289 Darmstadt, Germany..
    Riisager, K.
    Rodriguez-Tajes, C.
    Rossi, D.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.;Inst Kernphys Tech Univ, D-64289 Darmstadt, Germany..
    Savran, D.
    EMMI, ExtreMe Matter Inst, D-64291 Darmstadt, Germany.;FIAS, D-60438 Frankfurt, Germany..
    Schrieder, G.
    Inst Kernphys Tech Univ, D-64289 Darmstadt, Germany..
    Simon, H.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Stroth, J.
    Suemmerer, K.
    Tengblad, O.
    Typel, S.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.;Inst Kernphys Tech Univ, D-64289 Darmstadt, Germany..
    Weick, H.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Wiescher, M.
    Univ Notre Dame, JINA, Indiana, PA 46556 USA..
    Wimmer, C.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Comparison of electromagnetic and nuclear dissociation of Ne-172018Inngår i: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, nr 3, artikkel-id 034612Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The Borromean drip-line nucleus Ne-17 has been suggested to possess a two-proton halo structure in its ground state. In the astrophysical rp-process, where the two-proton capture reaction O-15(2p,gamma) Ne-17 plays an important role, the calculated reaction rate differs by several orders of magnitude between different theoretical approaches. To add to the understanding of the Ne-17 structure we have studied nuclear and electromagnetic dissociation. A 500 MeV/u Ne-17 beam was directed toward lead, carbon, and polyethylene targets. Oxygen isotopes in the final state were measured in coincidence with one or two protons. Different reaction branches in the dissociation of Ne-17 were disentangled. The relative populations of s and d states in F-16 were determined for light and heavy targets. The differential cross section for electromagnetic dissociation (EMD) shows a continuous internal energy spectrum in the three-body system O-15 + 2p. The Ne-17 EMD data were compared to current theoretical models. None of them, however, yields satisfactory agreement with the experimental data presented here. These new data may facilitate future development of adequate models for description of the fragmentation process.

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