A new measurement of the Li-6(n, alpha) t cross section at MeV energies using a Cf-252 fission chamber and Li-6 scintillators

作者：Kirsch Leo E^*; Devlin M; Mo**y S M; Gomez J A

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2017, 874: 57-65.

DOI：10.1016/j.nima.2017.08.046

• Cross section
• Cf-252 fission chamber
• Li-6
• Scintillator
• CLYC
• LiI( Eu)

A new measurement is presented of the Li-6(n, alpha) t cross section from 245 keV to 10 MeV using a(252)Cf fission chamber with (LiI)-Li-6(Eu) and Cs2LiYCl6: Ce (CLYC) scintillators which act as both target and detector. Neutron energies are determined from the time of flight (TOF) method using the signals from spontaneous fission and reaction product recoil. Simulations of neutron downscatter in the crystals and fission chamber bring Li-6(n, alpha) t cross section values measured with the (LiI)-Li-6(Eu) into agreement with previous experiments and evaluations, except for two resonances at 4.2 and 6.5 MeV introduced by ENDF/B-VII. 1. Suspected neutron transport modeling issues cause the cross section values obtained with CLYC to be discrepant above 2 MeV.

• 出版日期2017-12-1
• 单位Los Alamos