Fast neutron detection efficiency of Li-6 and Li-7 enriched CLYC scintillators using an Am-Be source

© 2018 IOP Publishing Ltd and Sissa Medialab. The fast neutrons produced by a calibrated 241 Am-Be source were detected by two different Cs 2 LiYCl 6 :Ce (CLYC) scintillator detectors. The two cylindrical crystals (1′′× 1′′ in size) were enriched with more than 99% of 7 Li (C7LYC) and with about 95% of 6 Li (C6LYC), respectively. Both crystals can detect fast neutrons whereas only C6LYC can also detect thermal neutrons, due to the presence of 6 Li. The measurement was performed at the L.A.S.A . Laboratory of INFN and University of Milano (Italy). To identify the neutron events, the Pulse-Shape-Discrimination technique was used. The values of 1.41 ± 0.16 for C6LYC and 1.16 ± 0.21 for C7LYC for the detection efficiency of the 241 Am-Be emitted neutrons, with energy up to 10 MeV, were deduced.

Publication year:2018