Development of ionisation chambers for the simultaneous measurement of the neutron-induced capture and fission cross section of 233U

Autor: L. Mathieu, G. Barreau, Jan Heyse, F. Gunsing, G. Boutoux, A. J. M. Plompen, I. Tsekhanovitch, M. Aïche, I. Companis, Grégoire Kessedjian, Peter Schillebeeckx, Beatriz Jurado, S. Czajkowski
Přispěvatelé: Vernay, Emmanuelle, Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), 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 Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Aval du cycle et Energie Nucléaire (ACEN), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2014
Předmět:
Zdroj: Nuclear Data Sheets
Nuclear Data Sheets, 2014, 119, pp.368-370. ⟨10.1016/j.nds.2014.08.101⟩
Nuclear Data Sheets, Elsevier, 2014, 119, ⟨10.1016/j.nds.2014.08.101⟩
International Conference on Nuclear Data for Science and Technology (ND2013)
International Conference on Nuclear Data for Science and Technology (ND2013), Mar 2013, New York, United States. pp.368-370
ISSN: 0090-3752
1095-9904
DOI: 10.1016/j.nds.2014.08.101⟩
Popis: A new simultaneous measurement of sigma(n,f) and sigma(n,gamma) will be performed at the neutron time-of-flight facility GELINA in Geel (Belgium). The fission events will be detected by a multi-plate high-efficiency ionisation chamber (IC). An efficient array of C6D6 scintillators will be used for the detection of gamma-rays. The disentanglement between fission and capture gamma-rays can be achieved by using anticoincidence events between the IC and the C6D6 detectors. Given the difference in the fission and capture cross sections, the assignment of a gamma-ray to one or the other reaction type has to be very efficient and reliable. The IC efficiency is not 100 % and a correction has to be applied to take into account the undetected fission events. To keep this correction factor low and reliable, the efficiency parameter of the IC should be high and known with a high degree of accuracy. The IC efficiency towards fission can be defined as a ratio between the number of detected neutrons in coincidence or not with fission fragments. It is therefore a value directly extractable from the experimental data. Results from test experiments of the IC will be presented and discussed, along with IC MCNPX simulations.
JRC.D.4-Standards for Nuclear Safety, Security and Safeguards
Databáze: OpenAIRE
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