[Zurück]

M. Bacak, M. Aiche, G. Belier, E. Berthoumieux, M. Diakaki, E. Dupont, F. Gunsing, H. Leeb, E. Griesmayer, E. Jericha, P. Kavrigin, C. Weiß, -. n_TOF Collaboration et al.:
"A compact fission detector for fission-tagging neutron capture experiments with radioactive fissile isotopes";
Nuclear Instruments & Methods in Physics Research Section A, 969 (2020), 163981; S. 1 - 10.

In the measurement of neutron capture cross-sections of fissile isotopes, the fission channel is a source of background which can be removed efficiently using the so-called fission-tagging or fission-veto technique. For this purpose a new compact and fast fission chamber has been developed. The design criteria and technical description of the chamber are given within the context of a measurement of the ²³³U(n,γ) cross-section at the n_TOF facility at CERN, where it was coupled to the n_TOF Total Absorption Calorimeter. For this measurement the fission detector was optimized for time resolution, minimization of material in the neutron beam and for alpha-fission discrimination. The performance of the fission chamber and its application as a fission tagging detector are discussed.

fission detector; U-233; n_TOF; time-of-flight

http://dx.doi.org/10.1016/j.nima.2020.163981