Measurement of high-energy prompt gamma-rays from neutron induced fission of U-235

Hiroyuki Makii (1) , Katsuhisa Nishio (1) , Kentaro Hirose (1) , Riccardo Orlandi (1) , Romain Léguillon (1) , Tatsuhiko Ogawa (2) , Torsten Soldner (3) , Franz-Josef Hambsch (4) , Alain Astier (5) , Andrew Pollitt (3) , Costel Petrache (5) , Igor Tsekhanovich (6) , Ludovic Mathieu (6) , Mourad Aïche (6) , Robert Frost (7) , Serge Czajkowski (6) , Song Guo (5) , Ulli Köster (3)

1 Advanced Science Research Center, Japan Atomic Energy Agency
2 Japan Atomic Energy Agency
3 ILL - Institut Laue-Langevin
4 IRMM - JRC Institute for Reference Materials and Measurements [Geel]
5 CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
6 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
7 School of Physics and Astronomy [Manchester]

We have developed a new setup to measure prompt γ-rays from the 235 U(n th , f) reaction. The setup consists of two multi-wire proportional counters (MWPCs) to detect the fission fragments, two LaBr 3 (Ce) scintillators to measure the γ-rays. The highly efficient setup was installed at the PF1B beam line of the Institut Laue Langevin (ILL). We have successfully measured the γ-ray spectrum up to about 20 MeV for the fist time in neutron-induced fission.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

Hiroyuki Makii, Katsuhisa Nishio, Kentaro Hirose, Riccardo Orlandi, Romain Léguillon, et al.. Measurement of high-energy prompt gamma-rays from neutron induced fission of U-235. EPJ Web of Conferences, 2017, 146, pp.4036 - 4036. ⟨10.1051/epjconf/201714604036⟩. ⟨hal-01701742⟩