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Simultaneous measurement of neutron-induced capture and fission reactions at CERN
Guerrero C., Berthoumieux E., Audouin L., Gunsing F., Tassan-Got L.
European Physical Journal A: Hadrons and Nuclei 48 (2012) 29 - http://hal.in2p3.fr/in2p3-00700873
Physique/Physique Nucléaire Expérimentale
Simultaneous measurement of neutron-induced capture and fission reactions at CERN
C. Guerrero, E. Berthoumieux1, L. Audouin2, F. Gunsing1, L. Tassan-Got2
1 :  IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)
CEA : DSM/IRFU
France
2 :  IPNO - Institut de Physique Nucléaire d'Orsay
http://ipnweb.in2p3.fr
CNRS : UMR8608 – IN2P3 – Université Paris XI - Paris Sud
IPN - 15, rue Georges Clemenceau - 91406 ORSAY CEDEX
France
The measurement of the capture cross-section of fissile elements, of utmost importance for the design of innovative nuclear reactors and the management of nuclear waste, faces particular difficulties related to the γ-ray background generated in the competing fission reactions. At the CERN neutron time-of-flight facility n TOF we have combined the Total Absorption Calorimeter (TAC) capture detector with a set of three 235U loaded MicroMegas (MGAS) fission detectors for measuring simultaneously two reactions: capture and fission. The results presented here include the determination of the three detection efficiencies involved in the process: εTAC(n, f), εTAC(n, γ) and εMGAS(n, f). In the test measurement we have succeeded in measuring simultaneously with a high total efficiency the 235U capture and fission cross-sections, disentangling accurately the two types of reactions. The work presented here proves that accurate capture cross-section measurements of fissile isotopes are feasible at n TOF.
TOF

Articles dans des revues avec comité de lecture
2012
European Physical Journal A: Hadrons and Nuclei (Eur. Phys. J. A)
Publisher EDP Sciences: EPJ
ISSN 1434-6001 (eISSN : 1434-601X)
48
29