uu.seUppsala University Publications
Change search
Link to record
Permanent link

Direct link
BETA
Alternative names
Publications (10 of 23) Show all publications
Diakaki, M., Audouin, L., Chen, Y., Leong, L.-S. -., Tassan-Got, L., Berthoumieux, E., . . . Wright, T. (2018). Fission Activities at the CERN n_TOF Facility. In: Hamilton, JH Ramayya, AV Talou, P (Ed.), Fission And Properties Of Neutron-Rich Nuclei: Proceedings of the Sixth International Conference on ICFN6. Paper presented at Sixth International Conference on Fission and Properties of Neutron-Rich Nuclei (ICFN6), November 6 - 12 2016, Florida, United States (pp. 529-537). World Scientific
Open this publication in new window or tab >>Fission Activities at the CERN n_TOF Facility
Show others...
2018 (English)In: 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, Published 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.

Place, publisher, year, edition, pages
World Scientific, 2018
Keywords
n_TOF Facility, Fission Cross Section, Fission Fragments
National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-365884 (URN)10.1142/9789813229426_0093 (DOI)000435216000093 ()978-981-3229-43-3 (ISBN)
Conference
Sixth International Conference on Fission and Properties of Neutron-Rich Nuclei (ICFN6), November 6 - 12 2016, Florida, United States
Available from: 2018-11-20 Created: 2018-11-20 Last updated: 2018-11-20Bibliographically approved
Mendoza, E., Cano-Ott, D., Altstadt, S., Andriamonje, S., Andrzejewski, J., Audouin, L., . . . \ifmmode \checkZ\else \vZ\fiugec, P. (2018). Measurement and analysis of the 241Am neutron capture cross section at the n_TOF facility at CERN. Phys. Rev. C, 97
Open this publication in new window or tab >>Measurement and analysis of the 241Am neutron capture cross section at the n_TOF facility at CERN
Show others...
2018 (English)In: Phys. Rev. C, Vol. 97Article in journal (Refereed) Published
Place, publisher, year, edition, pages
American Physical Society, 2018
National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-394875 (URN)10.1103/PhysRevC.97.054616 (DOI)
Available from: 2019-10-09 Created: 2019-10-09 Last updated: 2019-10-09
Praena, J., Sabaté-Gilarte, M., Porras, I., Quesada, J. M., Altstadt, S., Andrzejewski, J., . . . \ifmmode \checkZ\else \vZ\fiugec, P. (2018). Measurement and resonance analysis of the 33S(n,alpha)30Si cross section at the CERN n_TOF facility in the energy region from 10 to 300 keV. Phys. Rev. C, 97
Open this publication in new window or tab >>Measurement and resonance analysis of the 33S(n,alpha)30Si cross section at the CERN n_TOF facility in the energy region from 10 to 300 keV
Show others...
2018 (English)In: Phys. Rev. C, Vol. 97Article in journal (Refereed) Published
Place, publisher, year, edition, pages
American Physical Society, 2018
National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-394874 (URN)10.1103/PhysRevC.97.064603 (DOI)
Available from: 2019-10-09 Created: 2019-10-09 Last updated: 2019-10-09
Praena, J., Ferrer, F. J., Vollenberg, W., Sabaté-Gilarte, M., Fernández, B., García-López, J., . . . Ŝugec, P. (2018). Preparation and characterization of 33S samples for 33S(n,alpha)30Si cross-section measurements at the n_TOF facility at CERN. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 890, 142-147
Open this publication in new window or tab >>Preparation and characterization of 33S samples for 33S(n,alpha)30Si cross-section measurements at the n_TOF facility at CERN
Show others...
2018 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 890, p. 142-147Article in journal (Refereed) Published
Abstract [en]

Thin 33S samples for the study of the 33S(n,alpha)30Si cross-section at the n_TOF facility at CERN were made by thermal evaporation of 33S powder onto a dedicated substrate made of kapton covered with thin layers of copper, chromium and titanium. This method has provided for the first time bare sulfur samples a few centimeters in diameter. The samples have shown an excellent adherence with no mass loss after few years and no sublimation in vacuum at room temperature. The determination of the mass thickness of 33S has been performed by means of Rutherford backscattering spectrometry. The samples have been successfully tested under neutron irradiation.

Keywords
Neutron induced alpha emission, Thermal evaporation, Rutherford backscattering
National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-394873 (URN)10.1016/j.nima.2018.02.055 (DOI)
Available from: 2019-10-09 Created: 2019-10-09 Last updated: 2019-10-09
Al-Adili, A., Jansson, K., Tarrio, D., Hambsch, F.-J., Gook, A., Oberstedt, S., . . . Pomp, S. (2018). Studying fission neutrons with 2E-2v and 2E. In: Hambsch, FJ Carjan, N Rusko, I (Ed.), SCIENTIFIC WORKSHOP ON NUCLEAR FISSION DYNAMICS AND THE EMISSION OF PROMPT NEUTRONS AND GAMMA RAYS (THEORY-4): . Paper presented at 4th Scientific Workshop on Nuclear Fission Dynamics and the Emission of Prompt Neutrons and Gamma Rays (Theory), JUN 20-22, 2017, Varna, BULGARIA. , Article ID UNSP 00002.
Open this publication in new window or tab >>Studying fission neutrons with 2E-2v and 2E
Show others...
2018 (English)In: 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, Published 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.

Series
EPJ Web of Conferences, ISSN 2100-014X ; 169
National Category
Physical Sciences
Identifiers
urn:nbn:se:uu:diva-361440 (URN)10.1051/epjconf/201816900002 (DOI)000433153800001 ()978-2-7598-9031-6 (ISBN)
Conference
4th Scientific Workshop on Nuclear Fission Dynamics and the Emission of Prompt Neutrons and Gamma Rays (Theory), JUN 20-22, 2017, Varna, BULGARIA
Available from: 2018-12-10 Created: 2018-12-10 Last updated: 2019-02-28Bibliographically approved
Ledoux, X., Aiche, M., Avrigeanu, M., Avrigeanu, V., Balanzat, E., Ban-d'Etat, B., . . . Varignon, C. (2018). The Neutrons for Science Facility at SPIRAL-2. Paper presented at 13th Symposium on Neutron and Ion Dosimetry (NEUDOS), MAY 13-19, 2017, Polish Acad Sci, Inst Nucl Phys, Krakow, POLAND. Radiation Protection Dosimetry, 180(1-4), 115-119
Open this publication in new window or tab >>The Neutrons for Science Facility at SPIRAL-2
Show others...
2018 (English)In: Radiation Protection Dosimetry, ISSN 0144-8420, E-ISSN 1742-3406, Vol. 180, no 1-4, p. 115-119Article in journal (Refereed) Published
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.

Place, publisher, year, edition, pages
OXFORD UNIV PRESS, 2018
National Category
Accelerator Physics and Instrumentation
Identifiers
urn:nbn:se:uu:diva-364997 (URN)10.1093/rpd/ncx257 (DOI)000440983000025 ()29177426 (PubMedID)
Conference
13th Symposium on Neutron and Ion Dosimetry (NEUDOS), MAY 13-19, 2017, Polish Acad Sci, Inst Nucl Phys, Krakow, POLAND
Available from: 2018-11-08 Created: 2018-11-08 Last updated: 2019-02-28Bibliographically approved
Tarrio, D., Prokofiev, A. V., Gustavsson, C., Jansson, K., Andersson Sundén, E., Al-Adili, A. & Pomp, S. (2017). Characterization of the Medley setup for measurements of neutron-induced fission cross sections at the GANIL-NFS facility. In: Plompen, A.; Hambsch, FJ.; Schillebeeckx, P.; Mondelaers, W.; Heyse, J.; Kopecky, S.; Siegler, P.; Oberstedt, S. (Ed.), ND 2016: International Conference On Nuclear Data For Science And Technology. Paper presented at ND 2016: International Conference on Nuclear Data for Science and Technology, Sep 11-16, 2016, Bruges, Belgium.. Les Ulis: EDP Sciences, 146, Article ID 03026.
Open this publication in new window or tab >>Characterization of the Medley setup for measurements of neutron-induced fission cross sections at the GANIL-NFS facility
Show others...
2017 (English)In: 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, Published 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.

Place, publisher, year, edition, pages
Les Ulis: EDP Sciences, 2017
Series
EPJ Web of Conferences, ISSN 2100-014X
National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-338734 (URN)10.1051/epjconf/201714603026 (DOI)000426429500093 ()978-2-7598-9020-0 (ISBN)
Conference
ND 2016: International Conference on Nuclear Data for Science and Technology, Sep 11-16, 2016, Bruges, Belgium.
Funder
Swedish Research CouncilEU, FP7, Seventh Framework Programme, 605203
Available from: 2018-01-12 Created: 2018-01-12 Last updated: 2019-02-28Bibliographically approved
Leal-Cidoncha, E., Duran, I., Paradela, C., Tassan-Got, L., Audouin, L., Leal, L. C., . . . Žugec, P. (2017). High accuracy 234U(n,f) cross section in the resonance energy region. In: Plompen, A; Hambsch, FJ; Schillebeeckx, P; Mondelaers, W; Heyse, J; Kopecky, S; Siegler, P; Oberstedt, S (Ed.), ND 2016: INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY. Paper presented at ND 2016: INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY, SEP 11-16, 2016, Bruges, BELGIUM.. Les Ulis: EDP Sciences, 146, Article ID 04057.
Open this publication in new window or tab >>High accuracy 234U(n,f) cross section in the resonance energy region
Show others...
2017 (English)In: 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, Published 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.

Place, publisher, year, edition, pages
Les Ulis: EDP Sciences, 2017
Series
EPJ Web of Conferences, ISSN 2100-014X
National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-338741 (URN)10.1051/epjconf/201714604057 (DOI)000426429500156 ()978-2-7598-9020-0 (ISBN)
Conference
ND 2016: INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY, SEP 11-16, 2016, Bruges, BELGIUM.
Note

n_TOF Collaboration

Available from: 2018-01-12 Created: 2018-01-12 Last updated: 2018-06-29Bibliographically approved
Meo, S. L., Mancusi, D., Massimi, C., Tarrio, D., Vannini, G. & Ventura, A. (2017). Monte Carlo calculations of nucleon-induced fission in the GeV energy range. In: Plompen, A; Hambsch, FJ; Schillebeeckx, P; Mondelaers, W; Heyse, J; Kopecky, S; Siegler, P; Oberstedt, S (Ed.), ND 2016: INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY. Paper presented at ND 2016: INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY, SEP 11-16, 2016, Bruges, BELGIUM.. Les Ulis: EDP Sciences, 146, Article ID 04049.
Open this publication in new window or tab >>Monte Carlo calculations of nucleon-induced fission in the GeV energy range
Show others...
2017 (English)In: 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, Published 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.

Place, publisher, year, edition, pages
Les Ulis: EDP Sciences, 2017
Series
EPJ Web of Conferences, ISSN 2100-014X
National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-329737 (URN)10.1051/epjconf/201714604049 (DOI)000426429500148 ()978-2-7598-9020-0 (ISBN)
Conference
ND 2016: INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY, SEP 11-16, 2016, Bruges, BELGIUM.
Available from: 2017-09-20 Created: 2017-09-20 Last updated: 2018-06-29Bibliographically approved
Al-Adili, A., Tarrío, D., Hambsch, F.-J., Göök, A., Jansson, K., Solders, A., . . . Pomp, S. (2017). Neutron-multiplicity experiments for enhanced fission modelling. In: Plompen, A.; Hambsch, FJ.; Schillebeeckx, P.; Mondelaers, W.; Heyse, J.; Kopecky, S.; Siegler, P.; Oberstedt, S. (Ed.), EPJ Web of Conferences: . Paper presented at ND 2016: International Conference on Nuclear Data for Science and Technology, September 11-16, 2016, Bruges, Belgium.. , 146, Article ID 04056.
Open this publication in new window or tab >>Neutron-multiplicity experiments for enhanced fission modelling
Show others...
2017 (English)In: 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, Published 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.

Series
EPJ Web of Conferences, ISSN 2100-014X
National Category
Subatomic Physics
Research subject
Applied Nuclear Physics
Identifiers
urn:nbn:se:uu:diva-339390 (URN)10.1051/epjconf/201714604056 (DOI)000426429500155 ()978-2-7598-9020-0 (ISBN)
Conference
ND 2016: International Conference on Nuclear Data for Science and Technology, September 11-16, 2016, Bruges, Belgium.
Funder
Swedish Radiation Safety Authority
Available from: 2018-01-18 Created: 2018-01-18 Last updated: 2019-02-28Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-9858-3341

Search in DiVA

Show all publications