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Status of fission fragment observables measured with the LOHENGRIN spectrometer

Authors :
O Serot
S. Julien-Laferrière
David Bernard
Ulli Köster
Alain Letourneau
M. Ramdhane
L. Thombansen
Paolo Mutti
J. Nicholson
Aurelien Blanc
T. Materna
H. Faust
C. Sage
Abdelhazize Chebboubi
Olivier Litaize
O. Méplan
Grégoire Kessedjian
M. Rapala
Laboratoire de Physique Subatomique et de Cosmologie (LPSC)
Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
CEA Cadarache
Commissariat à l'énergie atomique et aux énergies alternatives (CEA)
Institut Laue-Langevin (ILL)
Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU)
Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay
Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)
ILL
Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )
Université Grenoble Alpes (UGA)
Source :
EPJ Web of Conferences, Vol 211, p 04004 (2019), EPJ Web Conf., 5th International Workshop On Nuclear Data Evaluation for Reactor Applications, 5th International Workshop On Nuclear Data Evaluation for Reactor Applications, Oct 2018, Aix-en-Provence, France. pp.04004, ⟨10.1051/epjconf/201921104004⟩, 'EPJ Web of Conferences ', vol: 211, pages: 04004-1-04004-8 (2019)
Publication Year :
2019
Publisher :
EDP Sciences, 2019.

Abstract

Nuclear fission yields are key parameters to evaluate reactor physics observables, such as fuel inventory, decay heat, spent fuel radiotoxicity, criticality but also for understanding the fission process. Despite a significant effort allocated to measure fission yields during the last decades, the recent evaluated libraries still need improvements in particular in the description of the uncertainties with the associated correlations. Additional kinds of measurements provide complementary information in order to test the models used in the nuclear data evaluation. Moreover, some discrepancies between these libraries must be explained. A common effort by the CEA, the LPSC and the ILL aims at tackling these issues by providing precise measurement of isotopic and isobaric fission yields with the related variance-covariance matrices. Nevertheless, the experimental program represents itself a large range of observables requested by the evaluations: isotopic yields, nuclear charge polarization, odd-even effect, isomeric ratio and their dependency with fission fragment kinetic energy as a probe of the nuclear de-excitation path in the (E*, Jπ) representation. Measurements for thermal neutron induced fission of 241Pu have been carried out at the Institut Laue Langevin using the LOHENGRIN mass spectrometer. Experimental program, observables reachable, results and comparison to model calculations are shown.

Details

Language :
English
Volume :
211
Database :
OpenAIRE
Journal :
EPJ Web of Conferences
Accession number :
edsair.doi.dedup.....6babb5d0c3b84b5547f44b5f5d3de3f9
Full Text :
https://doi.org/10.1051/epjconf/201921104004⟩