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  • 1.
    Al-Adili, Ali
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Jansson, Kaj
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Mattias, Lantz
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Solders, Andreas
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Gorelov, Dmitry
    Department of Physics, FI-40014 University of Jyväskylä, Finland.
    Gustavsson, Cecilia
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Mattera, Andrea
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Moore, Iain
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Prokofiev, Alexander
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Rakopoulos, Vasileios
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Penttilä, Heikki
    Department of Physics, FI-40014 University of Jyväskylä, Finland.
    Tarrío, Diego
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Wiberg, Sara
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Österlund, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Stephan, Pomp
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Simulations of the fission-product stopping efficiency in IGISOL2015In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 51, no 59, p. 1-7Article in journal (Refereed)
    Abstract [en]

    At the Jyväskylä Ion Guide Isotope Separator On-Line (IGISOL) facility, independent fission yields are measured employing the Penning-trap technique. Fission products are produced, e.g. by impinging protons on a uranium target, and are stopped in a gas-filled chamber. The products are collected by a flow of He gas and guided through a mass separator to a Penning trap, where their masses are identified. This work investigates how fission-product properties, such as mass and energy, affect the ion stopping efficiency in the gas cell. The study was performed using the Geant4 toolkit and the SRIM code. The main results show a nearly mass-independent ion stopping with regard to the wide spread of ion masses and energies, with a proper choice of uranium target thickness. Although small variations were observed, in the order of 5%, the results are within the systematic uncertainties of the simulations. To optimize the stopping efficiency while reducing the systematic errors, different experimental parameters were varied; for instance material thicknesses and He gas pressure. Different parameters influence the mass dependence and could alter the mass dependencies in the ion stopping efficiency.

  • 2.
    Al-Adili, Ali
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Jansson, Kaj
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Tarrio, Diego
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Hambsch, Franz-Josef
    European Commiss, Joint Res Ctr, Directorate G2, Geel, Belgium..
    Gook, Alf
    European Commiss, Joint Res Ctr, Directorate G2, Geel, Belgium..
    Oberstedt, Stephan
    European Commiss, Joint Res Ctr, Directorate G2, Geel, Belgium..
    Fregeau, Marc Olivier
    GANIL CEA DRF CNRS IN2P3, Caen, France..
    Gustavsson, Cecilia
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Lantz, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Mattera, Andrea
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Prokofiev, Alexander V.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Rakopoulos, Vasileios
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Solders, Andreas
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Vidali, Marzio
    European Commiss, Joint Res Ctr, Directorate G2, Geel, Belgium..
    Österlund, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Pomp, Stephan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Studying fission neutrons with 2E-2v and 2E2018In: SCIENTIFIC WORKSHOP ON NUCLEAR FISSION DYNAMICS AND THE EMISSION OF PROMPT NEUTRONS AND GAMMA RAYS (THEORY-4) / [ed] Hambsch, FJ Carjan, N Rusko, I, 2018, article id UNSP 00002Conference paper (Refereed)
    Abstract [en]

    This work aims at measuring prompt-fission neutrons at different excitation energies of the nucleus. Two independent techniques, the 2E-2v and the 2E techniques, are used to map the characteristics of the mass-dependent prompt fission neutron multiplicity, 7(A), when the excitation energy is increased. The VERDI 2E-2v spectrometer is being developed at JRC-GEEL. The Fission Fragment (FF) energies are measured using two arrays of 16 silicon (Si) detectors each. The FFs velocities are obtained by time-of-flight, measured between micro-channel plates (MCP) and Si detectors. With MCPs placed on both sides of the fission source, VERDI allows for independent timing measurements for both fragments. Cf-252(sf) was measured and the present results revealed particular features of the 2E-2v technique. Dedicated simulations were also performed using the GEF code to study important aspects of the 2E-2v technique. Our simulations show that prompt neutron emission has a non-negligible impact on the deduced fragment data and affects also the shape of 17(A). Geometrical constraints lead to a total-kinetic energy-dependent detection efficiency. The 2E technique utilizes an ionization chamber together with two liquid scintillator detectors. Two measurements have been performed, one of Cf-252(sf) and another one of thermal-neutron induced fission in U-235(n,f). Results from Cf-252(sf) are reported here.

  • 3.
    Al-Adili, Ali
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Tarrío, Diego
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Hambsch, F. -J
    EC JRC Inst Reference Mat & Measurements IRMM, Geel, Belgium.
    Gook, A.
    EC JRC Inst Reference Mat & Measurements IRMM, Geel, Belgium..
    Jansson, Kaj
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Solders, Andreas
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Rakopoulos, Vasileios
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Gustavsson, Cecilia
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Lantz, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Mattera, Andrea
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Oberstedt, S.
    EC JRC Inst Reference Mat & Measurements IRMM, Geel, Belgium..
    Prokofiev, Alexander V.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Vidali, M.
    EC JRC Inst Reference Mat & Measurements IRMM, Geel, Belgium..
    Österlund, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Pomp, Stephan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Analysis of prompt fission neutrons in U-235(nth,f) and fission fragment distributions for the thermal neutron induced fission of U-2342016In: CNR*15 - 5th International Workshop On Compound-Nuclear Reactions And Related Topics, 2016, article id 01007Conference paper (Refereed)
    Abstract [en]

    This paper presents the ongoing analysis of two fission experiments. Both projects are part of the collaboration between the nuclear reactions group at Uppsala and the JRC-IRMM. The first experiment deals with the prompt fission neutron multiplicity in the thermal neutron induced fission of U-235(n,f). The second, on the fission fragment properties in the thermal fission of U-234(n,f). The prompt fission neutron multiplicity has been measured at the JRC-IRMM using two liquid scintillators in coincidence with an ionization chamber. The first experimental campaign focused on U-235(nth,f) whereas a second experimental campaign is foreseen later for the same reaction at 5.5 MeV. The goal is to investigate how the so-called saw-tooth shape changes as a function of fragment mass and excitation energy. Some harsh experimental conditions were experienced due to the large radiation background. The solution to this will be discussed along with preliminary results. In addition, the analysis of thermal neutron induced fission of U-234(n,f) will be discussed. Currently analysis of data is ongoing, originally taken at the ILL reactor. The experiment is of particular interest since no measurement exist of the mass and energy distributions for this system at thermal energies. One main problem encountered during analysis was the huge background of U-235(nth, f). Despite the negligible isotopic traces in the sample, the cross section difference is enormous. Solution to this parasitic background will be highlighted.

  • 4.
    Al-Adili, Ali
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Tarrío, Diego
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Hambsch, Franz-Josef
    European Commission, Joint Research Centre, Directorate G, Geel, Belgium.
    Göök, Alf
    European Commission, Joint Research Centre, Directorate G, Geel, Belgium.
    Jansson, Kaj
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Solders, Andreas
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Rakopoulos, Vasileios
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Gustavsson, Cecilia
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Lantz, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Mattera, Andrea
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Oberstedt, Stephan
    European Commission, Joint Research Centre, Directorate G, Geel, Belgium.
    Prokofiev, Alexander V.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Sundén, Erik A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Vidali, Marzio
    European Commission, Joint Research Centre, Directorate G, Geel, Belgium.
    Österlund, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Pomp, Stephan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Neutron-multiplicity experiments for enhanced fission modelling2017In: EPJ Web of Conferences / [ed] Plompen, A.; Hambsch, FJ.; Schillebeeckx, P.; Mondelaers, W.; Heyse, J.; Kopecky, S.; Siegler, P.; Oberstedt, S., 2017, Vol. 146, article id 04056Conference paper (Refereed)
    Abstract [en]

    The nuclear de-excitation process of fission fragments (FF) provides fundamental information for the understanding of nuclear fission and nuclear structure in neutron-rich isotopes. The variation of the prompt-neutron multiplicity, ν(A), as a function of the incident neutron energy (En) is one of many open questions. It leads to significantly different treatments in various fission models and implies that experimental data are analyzed based on contradicting assumptions. One critical question is whether the additional excitation energy (Eexc) is manifested through an increase of ν(A) for all fragments or for the heavy ones only. A systematic investigation of ν(A) as a function of En has been initiated. Correlations between prompt-fission neutrons and fission fragments are obtained by using liquid scintillators in conjunction with a Frisch-grid ionization chamber. The proof-of-principle has been achieved on the reaction 235U(nth,f) at the Van De Graff (VdG) accelerator of the JRC-Geel using a fully digital data acquisition system. Neutrons from 252Cf(sf) were measured separately to quantify the neutron-scattering component due to surrounding shielding material and to determine the intrinsic detector efficiency. Prelimenary results on ν(A) and spectrum in correlation with FF properties are presented.

  • 5. Diakaki, M.
    et al.
    Audouin, L.
    Berthoumieux, E.
    Calviani, M.
    Colonna, N.
    Dupont, E.
    Duran, I.
    Gunsing, F.
    Leal-Cidoncha, E.
    Le Naour, C.
    Leong, L. S.
    Mastromarco, M.
    Paradela, C.
    Tarrío, Diego
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Tassan-Got, L.
    Aerts, G.
    Altstadt, S.
    Alvarez, H.
    Alvarez-Velarde, F.
    Andriamonje, S.
    Andrzejewski, J.
    Badurek, G.
    Barbagallo, M.
    Baumann, P.
    Becares, V.
    Becvar, F.
    Belloni, F.
    Berthier, B.
    Billowes, J.
    Boccone, V.
    Bosnar, D.
    Brugger, M.
    Calvino, F.
    Cano-Ott, D.
    Capote, R.
    Carrapiço, C.
    Cennini, P.
    Cerutti, F.
    Chiaveri, E.
    Chin, M.
    Cortes, G.
    Cortes-Giraldo, M. A.
    Cosentino, L.
    Couture, A.
    Cox, J.
    David, S.
    Dillmann, I.
    Domingo-Pardo, C.
    Dressler, R.
    Dridi, W.
    Eleftheriadis, C.
    Embid-Segura, M.
    Ferrant, L.
    Ferrari, A.
    Finocchiaro, P.
    Fraval, K.
    Fujii, K.
    Furman, W.
    Ganesan, S.
    Garcia, A. R.
    Giubrone, G.
    Gomez-Hornillos, M. B.
    Goncalves, I. F.
    Gonzalez-Romero, E.
    Goverdovski, A.
    Gramegna, F.
    Griesmayer, E.
    Guerrero, C.
    Gurusamy, P.
    Haight, R.
    Heil, M.
    Heinitz, S.
    Igashira, M.
    Isaev, S.
    Jenkins, D. G.
    Jericha, E.
    Kadi, Y.
    Kaeppeler, F.
    Karadimos, D.
    Karamanis, D.
    Kerveno, M.
    Ketlerov, V.
    Kivel, N.
    Kokkoris, M.
    Konovalov, V.
    Krticka, M.
    Kroll, J.
    Lampoudis, C.
    Langer, C.
    Lederer, C.
    Leeb, H.
    Lo Meo, S.
    Losito, R.
    Lozano, M.
    Manousos, A.
    Marganiec, J.
    Martinez, T.
    Marrone, S.
    Massimi, C.
    Mastinu, P.
    Mendoza, E.
    Mengoni, A.
    Milazzo, P. M.
    Mingrone, F.
    Mirea, M.
    Mondelaers, W.
    Moreau, C.
    Mosconi, M.
    Musumarra, A.
    O’Brien, S.
    Pancin, J.
    Patronis, N.
    Pavlik, A.
    Pavlopoulos, P.
    Perkowski, J.
    Perrot, L.
    Pigni, M. T.
    Plag, R.
    Plompen, A.
    Plukis, L.
    Poch, A.
    Pretel, C.
    Praena, J.
    Quesada, J.
    Rauscher, T.
    Reifarth, R.
    Riego, A.
    Roman, F.
    Rudolf, G.
    Rubbia, C.
    Rullhusen, P.
    Salgado, J.
    Santos, C.
    Sarchiapone, L.
    Sarmento, R.
    Saxena, A.
    Schillebeeckx, P.
    Schmidt, S.
    Schumann, D.
    Stephan, C.
    Tagliente, G.
    Tain, J. L.
    Tavora, L.
    Terlizzi, R.
    Tsinganis, A.
    Valenta, S.
    Vannini, G.
    Variale, V.
    Vaz, P.
    Ventura, A.
    Versaci, R.
    Vermeulen, M. J.
    Villamarin, D.
    Vincente, M. C.
    Vlachoudis, V.
    Vlastou, R.
    Voss, F.
    Wallner, A.
    Walter, S.
    Ware, T.
    Weigand, M.
    Weiß, C.
    Wiesher, M.
    Wisshak, K.
    Wright, T.
    Zugec, P.
    Towards the high-accuracy determination of the 238U fission cross section at the threshold region at CERN -€“ n_TOF2016Conference paper (Refereed)
    Abstract [en]

    The U-238 fission cross section is an international standard beyond 2 MeV where the fission plateau starts. However, due to its importance in fission reactors, this cross-section should be very accurately known also in the threshold region below 2 MeV. The U-238 fission cross section has been measured relative to the U-235 fission cross section at CERN - n_TOF with different detection systems. These datasets have been collected and suitably combined to increase the counting statistics in the threshold region from about 300 keV up to 3 MeV. The results are compared with other experimental data, evaluated libraries, and the IAEA standards.

  • 6.
    Diakaki, M.
    et al.
    Natl Tech Univ Athens, Dept Phys, Athens 15780, Greece;European Org Nucl Res CERN, Geneva, Switzerland.
    Audouin, L.
    IPN, CNRS, IN2P3, Orsay, France.
    Chen, Y.
    IPN, CNRS, IN2P3, Orsay, France.
    Leong, L. -S
    Tassan-Got, L.
    IPN, CNRS, IN2P3, Orsay, France.
    Berthoumieux, E.
    Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France.
    Dupont, E.
    Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France.
    Gunsing, F.
    Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France.
    Bacak, M.
    European Org Nucl Res CERN, Geneva, Switzerland.
    Calviani, M.
    European Org Nucl Res CERN, Geneva, Switzerland.
    Tsinganis, A.
    European Org Nucl Res CERN, Geneva, Switzerland.
    Colonna, N.
    Ist Nazl Fis Nucl, Sez Bari, Bari, Italy.
    Mastromarco, M.
    Ist Nazl Fis Nucl, Sez Bari, Bari, Italy.
    Duran, I.
    Univ Santiago de Compostela, Santiago, Spain.
    Leal-Cidoncha, E.
    Univ Santiago de Compostela, Santiago, Spain.
    Guerrero, C.
    Univ Seville, Seville, Spain.
    Paradela, C.
    IRMM, EC IRC, Geel, Belgium.
    Stamatopoulos, A.
    Natl Tech Univ Athens, Dept Phys, Athens 15780, Greece.
    Vlastou, R.
    Natl Tech Univ Athens, Dept Phys, Athens 15780, Greece.
    Tarrio, Diego
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Smith, A. G.
    Univ Manchester, Manchester M13 9PL, Lancs, England.
    Wright, T.
    Univ Manchester, Manchester M13 9PL, Lancs, England.
    Fission Activities at the CERN n_TOF Facility2018In: Fission And Properties Of Neutron-Rich Nuclei: Proceedings of the Sixth International Conference on ICFN6 / [ed] Hamilton, JH Ramayya, AV Talou, P, World Scientific, 2018, p. 529-537Conference paper (Refereed)
    Abstract [en]

    A major part of the scientific program of the CERN n_TOF facility involves the study of neutron-induced fission reactions, which is essential for nuclear technology, as well as for the development of the theoretical models of fission. An overview of the fission studies performed and the corresponding detection systems is given, with a short description of the latest highlights.

  • 7.
    Duran, Ignacio
    et al.
    Universidade de Santiago de Compostela (USC), Santiago de Compostela, Spain.
    Ventura, A.
    Istituto Nazionale di Fisica Nucleare, Bologna, Italy.
    Lo Meo, S.
    Istituto Nazionale di Fisica Nucleare, Bologna, Italy; Agenzia Nazionale per le Nuove Tecnologie, Bologna, Italy.
    Tarrio, Diego
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Tassan-Got, L.
    Centre National de la Recherche Scientifique/IN2P3 - IPN-Orsay, France.
    Paradela, C.
    European Commission JRC - IRMM, Geel, Belgium.
    On the search for a (n,f) cross-section reference at intermediate energies2017In: ND 2016: INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY / [ed] Plompen, A; Hambsch, FJ; Schillebeeckx, P; Mondelaers, W; Heyse, J; Kopecky, S; Siegler, P; Oberstedt, S, Les Ulis: EDP Sciences, 2017, Vol. 146, article id 02032Conference paper (Refereed)
    Abstract [en]

    The (n,f) cross-sections proposed as references by the IAEA for 235U, 238U and 209Bi are compared with a new analysis that combines the measurements performed at CERN-n_TOF of their cross-section ratios with new calculations done using Monte Carlo codes based on phenomenological models INCL+ +, GEMINI+ +, and ABLA07. The calculations are cross-checked with those for the (p,f) reactions, where experimental values are available. We have evaluated in this way the (n,f) cross sections for 238U, 235U and 209Bi, in the intermediate energy region going from 190 MeV to 2 GeV. Our results definitively discard the JENDL/HE-2007 evaluations above 300 MeV, falling inside the confidence corridor proposed by IAEA but for the points around 300–400 MeV where a discrepancy is to be noticed.

  • 8.
    Jansson, Kaj
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Gustavsson, Cecilia
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Al-Adili, Ali
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Hjalmarsson, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Andersson Sundén, Erik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Prokofiev, Alexander V.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics. Uppsala University, The Svedberg Laboratory.
    Tarrío, Diego
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Pomp, Stephan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Designing an upgrade of the Medley setup for light-ion production and fission cross-section measurements2015In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 794, p. 141-150Article in journal (Refereed)
    Abstract [en]

    Abstract Measurements of neutron-induced fission cross-sections and light-ion production are planned in the energy range 1-40 MeV at the upcoming Neutrons For Science (NFS) facility. In order to prepare our detector setup for the neutron beam with continuous energy spectrum, a simulation software was written using the Geant4 toolkit for both measurement situations. The neutron energy range around 20 MeV is troublesome when it comes to the cross-sections used by Geant4 since data-driven cross-sections are only available below 20 MeV but not above, where they are based on semi-empirical models. Several customisations were made to the standard classes in Geant4 in order to produce consistent results over the whole simulated energy range. Expected uncertainties are reported for both types of measurements. The simulations have shown that a simultaneous precision measurement of the three standard cross-sections H(n,n), 235U(n,f) and 238U(n,f) relative to each other is feasible using a triple layered target. As high resolution timing detectors for fission fragments we plan to use Parallel Plate Avalanche Counters (PPACs). The simulation results have put some restrictions on the design of these detectors as well as on the target design. This study suggests a fissile target no thicker than 2 µm (1.7 mg/cm2) and a PPAC foil thickness preferably less than 1 µm . We also comment on the usability of Geant4 for simulation studies of neutron reactions in this energy range.

  • 9.
    Jansson, Kaj
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Gustavsson, Cecilia
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Pomp, Stephan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Prokofiev, Alexander V.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics. Uppsala University, The Svedberg Laboratory.
    Scian, G.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Tarrio, Diego
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Measuring Light-ion Production and Fission Cross Sections Normalised to H(n,p) Scattering at the Upcoming NFS Facility2014In: Nuclear Data Sheets, ISSN 0090-3752, E-ISSN 1095-9904, Vol. 119, p. 395-397Article in journal (Refereed)
    Abstract [en]

    The Medley detector setup is planned to be moved to and used at the new neutron facility NFS where measurements of light-ion production and fission cross-sections are planned at 1-40 MeV. Medley has eight detector telescopes providing Delta E-Delta E-E data, each consisting of two silicon detectors and a CsI(Tl) detector at the back. The telescope setup can be rotated and arranged to cover any angle. Medley has previously been used in many measurements at The Svedberg Laboratory (TSL) in Uppsala mainly with a quasi-mono-energetic neutron beam at 96 and 175 MeV. To be able to do measurements at NFS, which will have a white neutron beam, Medley needs to detect the reaction products with a high timing resolution providing the ToF of the primary neutron. In this paper we discuss the design of the Medley upgrade along with simulations of the setup. We explore the use of Parallel Plate Avalanche Counters (PPACs) which work very well for detecting fission fragments but require more consideration for detecting deeply penetrating particles.

  • 10.
    Jansson, Kaj
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Gustavsson, Cecilia
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Pomp, Stephan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Prokofiev, Alexander V.
    Uppsala University, The Svedberg Laboratory.
    Scian, Giovanni
    Tarrio, Diego
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Measuring light-ion production and fission cross sections versus elastic np-scattering at the upcoming NFS facility2014Conference paper (Refereed)
  • 11. Leal-Cidoncha, E.
    et al.
    Duran, I.
    Paradela, C.
    Tarrío, Diego
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Leong, L. S.
    Tassan-Got, L.
    Audouin, L.
    Altstadt, S.
    Andrzejewski, J.
    Barbagallo, M.
    Bécares, V.
    Bečvář, F.
    Belloni, F.
    Berthoumieux, E.
    Billowes, J.
    Boccone, V.
    Bosnar, D.
    Brugger, M.
    Calviani, M.
    Calviño, F.
    Cano-Ott, D.
    Carrapiço, C.
    Cerutti, F.
    Chiaveri, E.
    Chin, M.
    Colonna, N.
    Cortés, G.
    Cortés-Giraldo, M. A.
    Diakaki, M.
    Domingo-Pardo, C.
    Dressler, R.
    Dzysiuk, N.
    Eleftheriadis, C.
    Ferrari, A.
    Fraval, K.
    Ganesan, S.
    García, A. R.
    Giubrone, G.
    Gómez-Hornillos, M. B.
    Gonçalves, I. F.
    González-Romero, E.
    Griesmayer, E.
    Guerrero, C.
    Gunsing, F.
    Gurusamy, P.
    Hernández-Prieto, A.
    Jenkins, D. G.
    Jericha, E.
    Kadi, Y.
    KÀppeler, F.
    Karadimos, D.
    Kivel, N.
    Koehler, P.
    Kokkoris, M.
    Krtička, M.
    Kroll, J.
    Lampoudis, C.
    Langer, C.
    Lederer, C.
    Leeb, H.
    Lo Meo, S.
    Losito, R.
    Mallick, A.
    Manousos, A.
    Marganiec, J.
    Martínez, T.
    Massimi, C.
    Mastinu, P. F.
    Mastromarco, M.
    Meaze, M.
    Mendoza, E.
    Mengoni, A.
    Milazzo, P. M.
    Mingrone, F.
    Mirea, M.
    Mondelaers, W.
    Pavlik, A.
    Perkowski, J.
    Plompen, A.
    Praena, J.
    Quesada, J. M.
    Rauscher, T.
    Reifarth, R.
    Riego, A.
    Robles, M. S.
    Roman, F.
    Rubbia, C.
    Sabaté-Gilarte, M.
    Sarmento, R.
    Saxena, A.
    Schillebeeckx, P.
    Schmidt, S.
    Schumann, D.
    Tagliente, G.
    Tain, J. L.
    Tsinganis, A.
    Valenta, S.
    Vannini, G.
    Variale, V.
    Vaz, P.
    Ventura, A.
    Versaci, R.
    Vermeulen, M. J.
    Vlachoudis, V.
    Vlastou, R.
    Wallner, A.
    Ware, T.
    Weigand, M.
    Weiß, C.
    Wright, T.
    Åœugec, P.
    Fission Fragment Angular Distribution measurements of 235U and 238U at CERN n_TOF facility2016Conference paper (Refereed)
    Abstract [en]

    Neutron-induced fission cross sections of U-238 and U-235 are used as standards in the fast neutron region up to 200 MeV. A high accuracy of the standards is relevant to experimentally determine other neutron reaction cross sections. Therefore, the detection efficiency should be corrected by using the angular distribution of the fission fragments (FFAD), which are barely known above 20 MeV. In addition, the angular distribution of the fragments produced in the fission of highly excited and deformed nuclei is an important observable to investigate the nuclear fission process. In order to measure the FFAD of neutron-induced reactions, a fission detection setup based on parallel-plate avalanche counters (PPACs) has been developed and successfully used at the CERN-n_TOF facility. In this work, we present the preliminary results on the analysis of new U-235(n,f) and U-238(n,f) data in the extended energy range up to 200 MeV compared to the existing experimental data.

  • 12. Leal-Cidoncha, E.
    et al.
    Duran, I.
    Paradela, C.
    Tassan-Got, L.
    Audouin, L.
    Leal, L. C.
    Naour, C. Le
    Noguere, G.
    Tarrio, Diego
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Leong, L. S.
    Altstadt, S.
    Andrzejewski, J.
    Barbagallo, M.
    Bécares, V.
    Bečvář, F.
    Belloni, F.
    Berthoumieux, E.
    Billowes, J.
    Boccone, V.
    Bosnar, D.
    Brugger, M.
    Calviani, M.
    Calviño, F.
    Cano-Ott, D.
    Carrapiço, C.
    Cerutti, F.
    Chiaveri, E.
    Chin, M.
    Colonna, N.
    Cortés, G.
    Cortés-Giraldo, M. A.
    Diakaki, M.
    Domingo-Pardo, C.
    Dressler, R.
    Eleftheriadis, C.
    Ferrari, A.
    Fraval, K.
    Ganesan, S.
    García, A. R.
    Giubrone, G.
    Gómez-Hornillos, M. B.
    Gonçalves, I. F.
    González-Romero, E.
    Griesmayer, E.
    Guerrero, C.
    Gunsing, F.
    Gurusamy, P.
    Hernández-Prieto, A.
    Jenkins, D. G.
    Jericha, E.
    Kadi, Y.
    Käppeler, F.
    Karadimos, D.
    Kivel, N.
    Kokkoris, M.
    Krtička, M.
    Kroll, J.
    Lampoudis, C.
    Langer, C.
    Lederer, C.
    Leeb, H.
    Losito, R.
    Mallick, A.
    Manousos, A.
    Marganiec, J.
    Martínez, T.
    Massimi, C.
    Mastinu, P. F.
    Mastromarco, M.
    Meaze, M.
    Mendoza, E.
    Mengoni, A.
    Milazzo, P. M.
    Mingrone, F.
    Mirea, M.
    Mondelaers, W.
    Pavlik, A.
    Perkowski, J.
    Plompen, A.
    Praena, J.
    Quesada, J. M.
    Rauscher, T.
    Reifarth, R.
    Riego, A.
    Robles, M. S.
    Roman, F.
    Rubbia, C.
    Sabaté-Gilarte, M.
    Sarmento, R.
    Saxena, A.
    Schillebeeckx, P.
    Schmidt, S.
    Schumann, D.
    Tagliente, G.
    Tain, J. L.
    Tsinganis, A.
    Valenta, S.
    Vannini, G.
    Variale, V.
    Vaz, P.
    Ventura, A.
    Versaci, R.
    Vermeulen, M. J.
    Vlachoudis, V.
    Vlastou, R.
    Wallner, A.
    Ware, T.
    Weigand, M.
    Weiß, C.
    Wright, T.
    Žugec, P.
    High accuracy 234U(n,f) cross section in the resonance energy region2017In: ND 2016: INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY / [ed] Plompen, A; Hambsch, FJ; Schillebeeckx, P; Mondelaers, W; Heyse, J; Kopecky, S; Siegler, P; Oberstedt, S, Les Ulis: EDP Sciences, 2017, Vol. 146, article id 04057Conference paper (Refereed)
    Abstract [en]

    New results are presented of the 234U neutron-induced fission cross section, obtained with high accuracy in the resonance region by means of two methods using the 235U(n,f) as reference. The recent evaluation of the 235U(n,f) obtained with SAMMY by L. C. Leal et al. (these Proceedings), based on previous n_TOF data [1], has been used to calculate the 234U(n,f) cross section through the 234U/235U ratio, being here compared with the results obtained by using the n_TOF neutron flux.

  • 13. Ledoux, X.
    et al.
    Aiche, M.
    Avrigeanu, M.
    Avrigeanu, V.
    Audouin, L.
    Balanzat, E.
    Ban-detat, B.
    Ban, G.
    Barreau, G.
    Bauge, E.
    Belier, G.
    Bem, P.
    Blideanu, V.
    Borcea, C.
    Bouffard, S.
    Caillaud, T.
    Chatillon, A.
    Czajkowski, S.
    Dessagne, P.
    Dore, D.
    Fallot, M.
    Farget, F.
    Fischer, U.
    Giot, L.
    Granier, T.
    Guillous, S.
    Gunsing, F.
    Gustavsson, Cecilia
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Jacquot, B.
    Jansson, Kaj
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Jurado, B.
    Kerveno, M.
    Klix, A.
    Landoas, O.
    Lecolley, F. R.
    Lecouey, J. L.
    Majerle, M.
    Marie, N.
    Materna, T.
    Mrazek, J.
    Negoita, F.
    Novak, J.
    Oberstedt, S.
    Oberstedt, A.
    Panebianco, S.
    Perrot, L.
    Plompen, A. J. M.
    Pomp, Stephan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Ramillon, J. M.
    Ridikas, D.
    Rosse, B.
    Rudolf, G.
    Serot, O.
    Simakov, S. P.
    Simeckova, E.
    Smith, A. G.
    Sublet, J. C.
    Taieb, J.
    Tassan-Got, L.
    Tarrio, D.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Takibayev, A.
    Thfoin, I.
    Tsekhanovich, I.
    Varignon, C.
    The Neutrons for Science Facility at SPIRAL-22014In: Nuclear Data Sheets, ISSN 0090-3752, E-ISSN 1095-9904, Vol. 119, p. 353-356Article in journal (Refereed)
    Abstract [en]

    The Neutrons For Science (NFS) facility is a component of SPIRAL-2 laboratory under construction at Caen (France). SPIRAL-2 is dedicated to the production of high intensity Radioactive Ions Beams (RIB). It is based on a high-power linear accelerator (LINAG) to accelerate deuterons beams in order to produce neutrons by breakup reactions on a C converter. These neutrons will induce fission in U-238 for production of radioactive isotopes. Additionally to the RIB production, the proton and deuteron beams delivered by the accelerator will be used in the NFS facility. NFS is composed of a pulsed neutron beam and irradiation stations for cross-section measurements and material studies. The beams delivered by the LINAG will allow producing intense neutron beams in the 100 keV-40 MeV energy range with either a continuous or quasi-mono-energetic spectrum. At NFS available average fluxes will be up to 2 orders of magnitude higher than those of other existing time-of-flight facilities in the 1 MeV - 40 MeV range. NFS will be a very powerful tool for fundamental physics and application related research in support of the transmutation of nuclear waste, design of future fission and fusion reactors, nuclear medicine or test and development of new detectors. The facility and its characteristics are described, and several examples of the first potential experiments are presented.

  • 14.
    Ledoux, X.
    et al.
    GANIL, Bd Henri Becquerel,BP 55027, F-14076 Caen 05, France..
    Aiche, M.
    CENBG, 19 Chemin Solarium,CS 10120, F-33175 Gradignan, France..
    Avrigeanu, M.
    NIPNE, Str Reactorului 30,POB MG-6, Bucharest, Romania..
    Avrigeanu, V.
    NIPNE, Str Reactorului 30,POB MG-6, Bucharest, Romania..
    Balanzat, E.
    CIMAP, Bd Henri Becquerel,BP 5133, F-14070 Caen 05, France..
    Ban-d'Etat, B.
    CIMAP, Bd Henri Becquerel,BP 5133, F-14070 Caen 05, France..
    Ban, G.
    LPC, 6 Bd Marechal Juin, F-14050 Caen, France..
    Bauge, E.
    CEA, DAM, DIF, F-91297 Arpajon, France..
    Belier, G.
    CEA, DAM, DIF, F-91297 Arpajon, France..
    Bem, P.
    NPI, CZ-25068 Rez, Czech Republic..
    Borcea, C.
    NIPNE, Str Reactorului 30,POB MG-6, Bucharest, Romania..
    Caillaud, T.
    CEA, DAM, DIF, F-91297 Arpajon, France..
    Chatillon, A.
    CEA, DAM, DIF, F-91297 Arpajon, France..
    Czajkowski, S.
    CENBG, 19 Chemin Solarium,CS 10120, F-33175 Gradignan, France..
    Dessagne, P.
    Unive Strasbourg, IPHC, UMR 7178, CNRS, 23 Rue Loess,BP 28, F-67037 Strasbourg 2, France..
    Dore, D.
    Univ Paris Saclay, CEA, DSM, IRFU,SPhN, F-91191 Gif Sur Yvette, France..
    Fischer, U.
    KIT, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany..
    Fregeau, M. O.
    GANIL, Bd Henri Becquerel,BP 55027, F-14076 Caen 05, France..
    Grinyer, J.
    GANIL, Bd Henri Becquerel,BP 55027, F-14076 Caen 05, France..
    Guillous, S.
    CIMAP, Bd Henri Becquerel,BP 5133, F-14070 Caen 05, France..
    Gunsing, F.
    Univ Paris Saclay, CEA, DSM, IRFU,SPhN, F-91191 Gif Sur Yvette, France..
    Gustavsson, Cecilia
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Henning, G.
    Unive Strasbourg, IPHC, UMR 7178, CNRS, 23 Rue Loess,BP 28, F-67037 Strasbourg 2, France..
    Jacquot, B.
    GANIL, Bd Henri Becquerel,BP 55027, F-14076 Caen 05, France..
    Jansson, Kaj
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Jurado, B.
    CENBG, 19 Chemin Solarium,CS 10120, F-33175 Gradignan, France..
    Kerveno, M.
    Unive Strasbourg, IPHC, UMR 7178, CNRS, 23 Rue Loess,BP 28, F-67037 Strasbourg 2, France..
    Klix, A.
    KIT, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany..
    Landoas, O.
    CEA, DAM, DIF, F-91297 Arpajon, France..
    Lecolley, F. R.
    LPC, 6 Bd Marechal Juin, F-14050 Caen, France..
    Lecouey, J. L.
    LPC, 6 Bd Marechal Juin, F-14050 Caen, France..
    Majerle, M.
    NPI, CZ-25068 Rez, Czech Republic..
    Marie, N.
    LPC, 6 Bd Marechal Juin, F-14050 Caen, France..
    Materna, T.
    Univ Paris Saclay, CEA, DSM, IRFU,SPhN, F-91191 Gif Sur Yvette, France..
    Mrazek, J.
    NPI, CZ-25068 Rez, Czech Republic..
    Novak, J.
    NPI, CZ-25068 Rez, Czech Republic..
    Oberstedt, S.
    European Commiss, Joint Res Ctr, Geel, Belgium..
    Oberstedt, A.
    ELI NP, Str Reactorului 30,POB MG-6, Bucharest, Romania..
    Panebianco, S.
    Univ Paris Saclay, CEA, DSM, IRFU,SPhN, F-91191 Gif Sur Yvette, France..
    Perrot, L.
    IPNO, 15 Rue Georges Clemenceau, F-91406 Orsay, France..
    Plompen, A. J. M.
    European Commiss, Joint Res Ctr, Geel, Belgium..
    Pomp, Stephan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Prokofiev, Alexander
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Ramillon, J. M.
    CIMAP, Bd Henri Becquerel,BP 5133, F-14070 Caen 05, France..
    Farget, F.
    GANIL, Bd Henri Becquerel,BP 55027, F-14076 Caen 05, France..
    Ridikas, D.
    Univ Paris Saclay, CEA, DSM, IRFU,SPhN, F-91191 Gif Sur Yvette, France..
    Rosse, B.
    CEA, DAM, DIF, F-91297 Arpajon, France..
    Serot, O.
    CEN Cadarache, CEA, DEN, F-13108 St Paul Les Durance, France..
    Simakov, S. P.
    KIT, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany..
    Simeckova, E.
    NPI, CZ-25068 Rez, Czech Republic..
    Stanoiu, M.
    NIPNE, Str Reactorului 30,POB MG-6, Bucharest, Romania..
    Stefanik, M.
    NPI, CZ-25068 Rez, Czech Republic..
    Sublet, J. C.
    Culham Ctr Fus Energy, Abingdon OX14 3DB, Oxon, England..
    Taieb, J.
    CEA, DAM, DIF, F-91297 Arpajon, France..
    Tarrio, Diego
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Tassan-Got, L.
    Thfoin, I.
    CEA, DAM, DIF, F-91297 Arpajon, France..
    Varignon, C.
    CEA, DAM, DIF, F-91297 Arpajon, France..
    The Neutrons for Science Facility at SPIRAL-22018In: Radiation Protection Dosimetry, ISSN 0144-8420, E-ISSN 1742-3406, Vol. 180, no 1-4, p. 115-119Article in journal (Refereed)
    Abstract [en]

    The neutrons for science (NFS) facility is a component of SPIRAL-2, the new superconducting linear accelerator built at GANIL in Caen (France). The proton and deuteron beams delivered by the accelerator will allow producing intense neutron fields in the 100 keV-40 MeV energy range. Continuous and quasi-mono-kinetic energy spectra, respectively, will be available at NFS, produced by the interaction of a deuteron beam on a thick Be converter and by the Li-7(p, n) reaction on thin converter. The pulsed neutron beam, with a flux up to two orders of magnitude higher than those of other existing time-of-flight facilities, will open new opportunities of experiments in fundamental research as well as in nuclear data measurements. In addition to the neutron beam, irradiation stations for neutron-, proton- and deuteron-induced reactions will be available for cross-sections measurements and for the irradiation of electronic devices or biological cells. NFS, whose first experiment is foreseen in 2018, will be a very powerful tool for physics, fundamental research as well as applications like the transmutation of nuclear waste, design of future fission and fusion reactors, nuclear medicine or test and development of new detectors.

  • 15. Ledoux, X.
    et al.
    Aïche, M.
    Avrigeanu, M.
    Avrigeanu, V.
    Balanzat, E.
    Ban-d'Etat, B.
    Ban, G.
    Bauge, E.
    Bélier, G.
    Bém, P.
    Borcea, C.
    Caillaud, T.
    Chatillon, A.
    Czajkowski, S.
    Dessagne, P.
    Doré, D.
    Fischer, U.
    Frégeau, M. O.
    Grinyer, J.
    Guillous, S.
    Gunsing, F.
    Gustavsson, Cecilia
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Henning, G.
    Jacquot, B.
    Jansson, Kaj
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Jurado, B.
    Kerveno, M.
    Klix, A.
    Landoas, O.
    Lecolley, F. R.
    Lecouey, J. L.
    Majerle, M.
    Marie, N.
    Materna, T.
    Mrázek, J.
    Negoita, F.
    Novák, J.
    Oberstedt, S.
    Oberstedt, A.
    Panebianco, S.
    Perrot, L.
    Plompen, A. J. M.
    Pomp, Stephan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Prokofiev, Alexander
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Ramillon, J. M.
    Farget, F.
    Ridikas, D.
    Rossé, B.
    Sérot, O.
    Simakov, S. P.
    Šimečková, E.
    Štefánik, M.
    Sublet, J. C.
    Taïeb, J.
    Tarrío, Diego
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Tassan-Got, L.
    Thfoin, I.
    Varignon, C.
    The neutrons for science facility at SPIRAL-22017In: ND 2016: INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY / [ed] Plompen, A; Hambsch, FJ; Schillebeeckx, P; Mondelaers, W; Heyse, J; Kopecky, S; Siegler, P; Oberstedt, S, Les Ulis: EDP Sciences, 2017, article id 03003Conference paper (Refereed)
    Abstract [en]

    Numerous domains, in fundamental research as well as in applications, require the study of reactions induced by neutrons with energies from few MeV up to few tens of MeV. Reliable measurements also are necessary to improve the evaluated databases used by nuclear transport codes. This energy range covers a large number of topics like transmutation of nuclear waste, design of future fission and fusion reactors, nuclear medicine or test and development of new detectors. A new facility called Neutrons For Science (NFS) is being built for this purpose on the GANIL site at Caen (France). NFS is composed of a pulsed neutron beam for time-of-flight facility as well as irradiation stations for cross-section measurements. Neutrons will be produced by the interaction of deuteron and proton beams, delivered by the SPIRAL-2 linear accelerator, with thick or thin converters made of beryllium or lithium. Continuous and quasi-mono-energetic spectra will be available at NFS up to 40 MeV. In this fast energy region, the neutron flux is expected to be up to 2 orders of magnitude higher than at other existing time-of-flight facilities. In addition, irradiation stations for neutron-, proton- and deuteron-induced reactions will allow performing cross-section measurements by the activation technique. After a description of the facility and its characteristics, the experiments to be performed in the short and medium term will be presented.

  • 16. Meo, Sergio Lo
    et al.
    Mancusi, Davide
    Massimi, Cristian
    Tarrio, Diego
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Vannini, Gianni
    Ventura, Alberto
    Monte Carlo calculations of nucleon-induced fission in the GeV energy range2017In: ND 2016: INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY / [ed] Plompen, A; Hambsch, FJ; Schillebeeckx, P; Mondelaers, W; Heyse, J; Kopecky, S; Siegler, P; Oberstedt, S, Les Ulis: EDP Sciences, 2017, Vol. 146, article id 04049Conference paper (Refereed)
    Abstract [en]

    In the present work the Monte Carlo calculations of nucleon-induced fission on actinides and pre-actinides from 100 MeV to 1 GeV, described in a recent paper of ours [1], are extended up to an incident energy of 8 GeV. The calculated (p,f) cross sections are compared with the few experimental data available in the literature. The same model parameters are used to predict (n,f) cross sections in the same energy range. Possible shortcomings of decay models at high incident energies are discussed.

  • 17. Paradela, C.
    et al.
    Duran, I.
    Tassan-Got, L.
    Audouin, L.
    Berthier, B.
    Isaev, S.
    Le Naour, C.
    Stephan, C.
    Tarrío, Diego
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Abbondanno, U.
    Aerts, G.
    Álvarez-Pol, H.
    Álvarez-Velarde, F.
    Andriamonje, S.
    Andrzejewski, J.
    Badurek, G.
    Baumann, P.
    Becvar, F.
    Berthoumieux, E.
    Calviño, F.
    Calviani, M.
    Cano-Ott, D.
    Capote, R.
    Carrapiço, C.
    Cennini, P.
    Chepel, V.
    Chiaveri, E.
    Colonna, N.
    Cortes, G.
    Couture, A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Cox, J.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Dahlfors, M.
    David, S.
    Dillmann, I.
    Domingo-Pardo, C.
    Dridi, W.
    Eleftheriadis, C.
    Embid-Segura, M.
    Ferrant, L.
    Ferrari, A.
    Ferreira-Marques, R.
    Fujii, K.
    Furman, W.
    Gonçalves, I. F.
    Gonzalez-Romero, E.
    Goverdovski, A.
    Gramegna, F.
    Guerrero, C.
    Gunsing, F.
    Haight, R.
    Heil, M.
    Igashira, M.
    Jericha, E.
    Kadi, Y.
    Kaeppeler, F.
    Karadimos, D.
    Kerveno, M.
    Ketlerov, V.
    Koehler, P.
    Konovalov, V.
    Krticka, M.
    Lampoudis, C.
    Lederer, C.
    Leeb, H.
    Lindote, A.
    Lukic, S.
    Marganiec, J.
    Martinez, T.
    Marrone, S.
    Massimi, C.
    Mastinu, P.
    Mengoni, A.
    Milazzo, P. M.
    Moreau, C.
    Mosconi, M.
    Pancin, S ,J.
    Pavlik, A.
    Pavlopoulos, P.
    Perrot, L.
    Plag, R.
    Plompen, A.
    Plukis, A.
    Poch, A.
    Pretel, C.
    Praena, J.
    Quesada, J.
    Rauscher, T.
    Reifarth, R.
    Rubbia, C.
    Rudolf, G.
    Rullhusen, P.
    Salgado, J.
    Santos, C.
    Sarchiapone, L.
    Savvidis, I.
    Tagliente, G.
    Tain, J. L.
    Tavora, L.
    Terlizzi, R.
    Vaz, P.
    Ventura, A.
    Villamarin, D.
    Vincente, M. C.
    Vlachoudis, V.
    Vlastou, R.
    Voss, F.
    Walter, S.
    Weiss, C.
    Wiesher, M.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wisshak, K.
    High accuracy 235U(n,f) data in the resonance energy region2016Conference paper (Refereed)
    Abstract [en]

    The U-235 neutron-induced cross section is widely used as reference cross section for measuring other fission cross sections, but in the resonance region it is not considered as an IAEA standard because of the scarce experimental data covering the full region. In this work, we deal with a new analysis of the experimental data obtained with a detection setup based on parallel plate ionization chambers (PPACs) at the CERN n_TOF facility in the range from 1 eV to 10 keV. The relative cross section has been normalised to the IAEA value in the region between 7.8 and 11 eV, which is claimed as well-known. Comparison with the ENDF/B-VII evaluation and the IAEA reference file from 100 eV to 10 keV are provided.

  • 18.
    Tarrio, Diego
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Prokofiev, Alexander V.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Gustavsson, Cecilia
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Jansson, Kaj
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Andersson Sundén, Erik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Al-Adili, Ali
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Pomp, Stephan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Characterization of the Medley setup for measurements of neutron-induced fission cross sections at the GANIL-NFS facility2017In: ND 2016: International Conference On Nuclear Data For Science And Technology / [ed] Plompen, A.; Hambsch, FJ.; Schillebeeckx, P.; Mondelaers, W.; Heyse, J.; Kopecky, S.; Siegler, P.; Oberstedt, S., Les Ulis: EDP Sciences, 2017, Vol. 146, article id 03026Conference paper (Refereed)
    Abstract [en]

    Neutron-induced fission cross sections of 235U and 238U are widely used as standards for monitoring of neutron beams and fields. An absolute measurement of these cross sections at an absolute scale, i.e., versus the H(n,p) scattering cross section, is planned with the white neutron beam under construction at the Neutrons For Science (NFS) facility in GANIL. The experimental setup, based on PPACs and ΔE-ΔE-E telescopes containing Silicon and CsI(Tl) detectors, is described. The expected uncertainties are discussed.

  • 19.
    Tarrío, Diego
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Leong, L. S.
    Audouin, L.
    Duran, I.
    Paradela, C.
    Tassan-Got, L.
    Altstadt, S.
    Andrzejewski, J.
    Barbagallo, M.
    Becares, V.
    Becvar, F.
    Belloni, F.
    Berthoumieux, E.
    Billowes, J.
    Boccone, V.
    Bosnar, D.
    Brugger, M.
    Calviani, M.
    Calvino, F.
    Cano-Ott, D.
    Carrapico, C.
    Cerutti, F.
    Chiaveri, E.
    Chin, M.
    Colonna, N.
    Cortes, G.
    Cortes-Giraldo, M. A.
    Diakaki, M.
    Domingo-Pardo, C.
    Dzysiuk, N.
    Eleftheriadis, C.
    Ferrari, A.
    Fraval, K.
    Ganesan, S.
    Garcia, A. R.
    Giubrone, G.
    Gomez-Hornillos, M. B.
    Goncalves, I. F.
    Gonzalez-Romero, E.
    Griesmayer, E.
    Guerrero, C.
    Gunsing, F.
    Gurusamy, P.
    Jenkins, D. G.
    Jericha, E.
    Kadi, Y.
    Kaeppeler, F.
    Karadimos, D.
    Koehler, P.
    Kokkoris, M.
    Krticka, M.
    Kroll, J.
    Langer, C.
    Lederer, C.
    Leeb, H.
    Losito, R.
    Manousos, A.
    Marganiec, J.
    Martinez, T.
    Massimi, C.
    Mastinu, P. F.
    Mastromarco, M.
    Meaze, M.
    Mendoza, E.
    Mengoni, A.
    Milazzo, P. M.
    Mingrone, F.
    Mirea, M.
    Mondalaers, W.
    Pavlik, A.
    Perkowski, J.
    Plompen, A.
    Praena, J.
    Quesada, J. M.
    Rauscher, T.
    Reifarth, R.
    Riego, A.
    Roman, F.
    Rubbia, C.
    Sarmento, R.
    Schillebeeckx, P.
    Schmidt, S.
    Tagliente, G.
    Tain, J. L.
    Tsinganis, A.
    Valenta, S.
    Vannini, G.
    Variale, V.
    Vaz, P.
    Ventura, A.
    Versaci, R.
    Vermeulen, M. J.
    Vlachoudis, V.
    Vlastou, R.
    Wallner, A.
    Ware, T.
    Weigand, M.
    Weiss, C.
    Wright, T. J.
    Zugec, P.
    Fission Fragment Angular Distribution of Th-232(n,f) at the CERN n_TOF Facility2014In: Nuclear Data Sheets, ISSN 0090-3752, E-ISSN 1095-9904, Vol. 119, p. 35-37Article in journal (Refereed)
    Abstract [en]

    The angular distribution of fragments emitted in neutron-induced fission of Th-232 was measured in the white spectrum neutron beam at the n_TOF facility at CERN. A reaction chamber based on Parallel Plate Avalanche Counters (PPAC) was used, where the detectors and the targets have been tilted 45 degrees with respect to the neutron beam direction in order to cover the full angular range of the fission fragments. A GEANT4 simulation has been developed to study the setup efficiency. The data analysis and the preliminary results obtained for the Th-232(n,f) between fission threshold and 100 MeV are presented here.

  • 20.
    Tarrío, Diego
    et al.
    Univ Santiago de Compostela, Santiago De Compostela, Spain..
    Leong, L. S.
    Univ Paris 11, CNRS, IN2P3, F-91405 Orsay, France..
    Audouin, L.
    Univ Paris 11, CNRS, IN2P3, F-91405 Orsay, France..
    Duran, I.
    Univ Santiago de Compostela, Santiago De Compostela, Spain..
    Paradela, C.
    Univ Santiago de Compostela, Santiago De Compostela, Spain..
    Tassan-Got, L.
    Univ Paris 11, CNRS, IN2P3, F-91405 Orsay, France..
    Le Naour, C.
    Univ Paris 11, CNRS, IN2P3, F-91405 Orsay, France..
    Bacri, C. O.
    Univ Paris 11, CNRS, IN2P3, F-91405 Orsay, France..
    Petitbon, V.
    Univ Paris 11, CNRS, IN2P3, F-91405 Orsay, France..
    Mottier, J.
    Univ Paris 11, CNRS, IN2P3, F-91405 Orsay, France..
    Caamano, M.
    Univ Santiago de Compostela, Santiago De Compostela, Spain..
    Altstadt, S.
    Goethe Univ Frankfurt, D-60054 Frankfurt, Germany..
    Andrzejewski, J.
    Uniwersytet Lodzki, Lodz, Poland..
    Barbagallo, M.
    Ist Nazl Fis Nucl, I-70126 Bari, Italy..
    Becares, V.
    CIEMAT, Madrid, Spain..
    Becvar, F.
    Charles Univ Prague, Prague, Czech Republic..
    Belloni, F.
    CEA Saclay, F-91191 Gif Sur Yvette, France..
    Berthoumieux, E.
    CEA Saclay, F-91191 Gif Sur Yvette, France.;CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland..
    Billowes, J.
    Univ Manchester, Manchester, Lancs, England..
    Boccone, V.
    CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland..
    Bosnar, D.
    Univ Zagreb, Fac Sci, Dept Phys, Zagreb 41000, Croatia..
    Brugger, M.
    CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland..
    Calviani, M.
    CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland..
    Calvino, F.
    Univ Politecn Cataluna, Barcelona, Spain..
    Cano-Ott, D.
    CIEMAT, Madrid, Spain..
    Carrapico, C.
    Univ Tecn Lisboa, Inst Super Tecn, Inst Tecnol Nucl, P-1096 Lisbon, Portugal..
    Cerutti, F.
    CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland..
    Chiaveri, E.
    CEA Saclay, F-91191 Gif Sur Yvette, France.;CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland..
    Chin, M.
    CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland..
    Colonna, N.
    Ist Nazl Fis Nucl, I-70126 Bari, Italy..
    Cortes, G.
    Univ Politecn Cataluna, Barcelona, Spain..
    Cortes-Giraldo, M. A.
    Univ Seville, Seville, Spain..
    Diakaki, M.
    Natl Tech Univ Athens, GR-10682 Athens, Greece..
    Domingo-Pardo, C.
    Univ Valencia, CSIC, Inst Fis Corpuscular, E-46003 Valencia, Spain..
    Dzysiuk, N.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, Legnaro, Italy..
    Eleftheriadis, C.
    Aristotle Univ Thessaloniki, GR-54006 Thessaloniki, Greece..
    Ferrari, A.
    CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland..
    Fraval, K.
    CEA Saclay, F-91191 Gif Sur Yvette, France..
    Ganesan, S.
    Bhabha Atom Res Ctr, Bombay 400085, Maharashtra, India..
    Garcia, A. R.
    CIEMAT, Madrid, Spain..
    Giubrone, G.
    Univ Valencia, CSIC, Inst Fis Corpuscular, E-46003 Valencia, Spain..
    Gomez-Hornillos, M. B.
    Univ Politecn Cataluna, Barcelona, Spain..
    Goncalves, I. F.
    Univ Tecn Lisboa, Inst Super Tecn, Inst Tecnol Nucl, P-1096 Lisbon, Portugal..
    Gonzalez-Romero, E.
    CIEMAT, Madrid, Spain..
    Griesmayer, E.
    Vienna Univ Technol, Atominst, Vienna, Austria..
    Guerrero, C.
    CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland..
    Gunsing, F.
    CEA Saclay, F-91191 Gif Sur Yvette, France..
    Gurusamy, P.
    Bhabha Atom Res Ctr, Bombay 400085, Maharashtra, India..
    Jenkins, G.
    Univ York, York YO10 5DD, N Yorkshire, England..
    Jericha, E.
    Vienna Univ Technol, Atominst, Vienna, Austria..
    Kadi, Y.
    CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland..
    Kaeppeler, F.
    Karlsruhe Inst Technol, Inst Kernphys, D-76021 Karlsruhe, Germany..
    Karadimos, D.
    Natl Tech Univ Athens, GR-10682 Athens, Greece..
    Koehler, P.
    Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA..
    Kokkoris, M.
    Natl Tech Univ Athens, GR-10682 Athens, Greece..
    Krticka, M.
    Charles Univ Prague, Prague, Czech Republic..
    Kroll, J.
    Charles Univ Prague, Prague, Czech Republic..
    Langer, C.
    Goethe Univ Frankfurt, D-60054 Frankfurt, Germany..
    Lederer, C.
    Goethe Univ Frankfurt, D-60054 Frankfurt, Germany.;Univ Vienna, Fac Phys, A-1010 Vienna, Austria..
    Leeb, H.
    Vienna Univ Technol, Atominst, Vienna, Austria..
    Losito, R.
    CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland..
    Manousos, A.
    Aristotle Univ Thessaloniki, GR-54006 Thessaloniki, Greece..
    Marganiec, J.
    Uniwersytet Lodzki, Lodz, Poland..
    Martinez, T.
    CIEMAT, Madrid, Spain..
    Massimi, C.
    Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy.;Sez INFN Bologna, Bologna, Italy..
    Mastinu, P. F.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, Legnaro, Italy..
    Mastromarco, M.
    Ist Nazl Fis Nucl, I-70126 Bari, Italy..
    Meaze, M.
    Ist Nazl Fis Nucl, I-70126 Bari, Italy..
    Mendoza, E.
    CIEMAT, Madrid, Spain..
    Mengoni, A.
    ENEA, Agenzia Nazl Nuove Tecnol, Bologna, Italy..
    Milazzo, P. M.
    Ist Nazl Fis Nucl, Trieste, Italy..
    Mingrone, F.
    Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy.;Sez INFN Bologna, Bologna, Italy..
    Mirea, M.
    Horia Hulubei Natl Inst Phys & Nucl Engn IFIN HH, Bucharest, Romania..
    Mondalaers, W.
    Commiss European Communities, Joint Res Ctr, Inst Reference Mat & Measurements, B-2440 Geel, Belgium..
    Pavlik, A.
    Univ Vienna, Fac Phys, A-1010 Vienna, Austria..
    Perkowski, J.
    Uniwersytet Lodzki, Lodz, Poland..
    Plompen, A.
    Commiss European Communities, Joint Res Ctr, Inst Reference Mat & Measurements, B-2440 Geel, Belgium..
    Praena, J.
    Univ Seville, Seville, Spain..
    Quesada, J. M.
    Univ Seville, Seville, Spain..
    Rauscher, T.
    Univ Basel, Dept Phys & Astron, Basel, Switzerland..
    Reifarth, R.
    Goethe Univ Frankfurt, D-60054 Frankfurt, Germany..
    Riego, A.
    Univ Politecn Cataluna, Barcelona, Spain..
    Roman, F.
    CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland.;Horia Hulubei Natl Inst Phys & Nucl Engn IFIN HH, Bucharest, Romania..
    Rubbia, C.
    CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland.;Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, Assergi, AQ, Italy..
    Sarmento, R.
    Univ Tecn Lisboa, Inst Super Tecn, Inst Tecnol Nucl, P-1096 Lisbon, Portugal..
    Schillebeeckx, P.
    Commiss European Communities, Joint Res Ctr, Inst Reference Mat & Measurements, B-2440 Geel, Belgium..
    Schmidt, S.
    Goethe Univ Frankfurt, D-60054 Frankfurt, Germany..
    Tagliente, G.
    Ist Nazl Fis Nucl, I-70126 Bari, Italy..
    Tain, J. L.
    Univ Valencia, CSIC, Inst Fis Corpuscular, E-46003 Valencia, Spain..
    Tsinganis, A.
    CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland..
    Valenta, S.
    Charles Univ Prague, Prague, Czech Republic..
    Vannini, G.
    Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy.;Sez INFN Bologna, Bologna, Italy..
    Variale, V.
    Ist Nazl Fis Nucl, I-70126 Bari, Italy..
    Vaz, P.
    Univ Tecn Lisboa, Inst Super Tecn, Inst Tecnol Nucl, P-1096 Lisbon, Portugal..
    Ventura, A.
    ENEA, Agenzia Nazl Nuove Tecnol, Bologna, Italy..
    Versaci, R.
    CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland..
    Vermeulen, M. J.
    Univ York, York YO10 5DD, N Yorkshire, England..
    Vlachoudis, V.
    CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland..
    Vlastou, R.
    Natl Tech Univ Athens, GR-10682 Athens, Greece..
    Wallner, A.
    Univ Vienna, Fac Phys, A-1010 Vienna, Austria..
    Ware, T.
    Univ Manchester, Manchester, Lancs, England..
    Weigand, M.
    Goethe Univ Frankfurt, D-60054 Frankfurt, Germany..
    Weiss, C.
    Vienna Univ Technol, Atominst, Vienna, Austria..
    Wright, T. J.
    Univ Manchester, Manchester, Lancs, England..
    Zugec, P.
    Univ Zagreb, Fac Sci, Dept Phys, Zagreb 41000, Croatia..
    Measurement of the angular distribution of fission fragments using a PPAC assembly at CERN n_TOF2014In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 743, p. 79-85Article in journal (Refereed)
    Abstract [en]

    A fission reaction chamber based on Parallel Plate Avalanche Counters (PPACs) was built for measuring angular distributions of fragments emitted in neutron-induced fission of actinides at the neutron beam available at the Neutron Time-Of-Flight (n_TOF) facility at CERN. The detectors and the samples were tilted 45 degrees with respect to the neutron beam direction to cover all the possible values of the emission angle of the fission fragments. The main features of this setup are discussed and results on the fission fragment angular distribution are provided for the Th-232(n,f) reaction around the fission threshold. The results are compared with the available data in the literature, demonstrating the good capabilities of this setup.

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