[Zurück]

S. Amaducci, M. Bacak, E. Griesmayer, E. Jericha, P. Kavrigin, H. Leeb, C. Weiß, -. n_TOF Collaboration et al.:
"Accurate measurement of the standard ²³⁵U(n,f) cross section from thermal to 170 keV neutron energy";
EPJ Web of Conferences, 239 (2020), 08002; S. 1 - 5.

An accurate measurement of the ²³⁵U(n,f) cross section from thermal to 170 keV of neutron energy has recently been performed at n_TOF facility at CERN using ⁶Li(n,t)⁴He and ¹⁰B(n,α)⁷Li as references. This measurement has been carried out in order to investigate a possible overestimation of the ²³⁵U fission cross section evaluation provided by most recent libraries between 10 and 30 keV. A custom experimental apparatus based on in-beam silicon detectors has been used, and a Monte Carlo simulation in GEANT4 has been employed to characterize the setup and calculate detectors efficiency. The results evidenced the presence of an overestimation in the interval between 9 and 18 keV and the new data may be used to decrease the uncertainty of ²³⁵U(n,f) cross section in the keV region.

http://dx.doi.org/10.1051/epjconf/202023908002