WU Maojia1 HE Bin1 OUYANG Xiaoping2 CHEN Liang2 WANG Dong1 ZUO Guangxia1 1. Design of a high efficiency boron-loaded plastic scintillation detector for a wide spectrum of neutrons[J]. Nuclear techniques, 2011, 34(8): 599-603.
WU Maojia1 HE Bin1 OUYANG Xiaoping2 CHEN Liang2 WANG Dong1 ZUO Guangxia1 1. Design of a high efficiency boron-loaded plastic scintillation detector for a wide spectrum of neutrons[J]. Nuclear techniques, 2011, 34(8): 599-603.DOI:
For improving detection efficiency of 0.02–0.25 MeV neutrons by boron-loaded plastic scintillation detector(BLPSD)
surrounding the scintillator with polyethylene moderator is feasible way.In this paper
the detection efficiency of a BLPSD with front and side PE moderators of different thicknesses is simulated by MCNP code
and the thickness-dependant detection efficiencies are given.The results show the side PE moderator of 80 mm thick increases the BLPSD detection efficiency of 0.02–0.25 MeV neutrons by a factor of about
but the front PE moderator decreases the detection efficiency.Finally
the design structure of BLPSD surrounded by side PE moderator can realize high detection efficiency for a wide spectrum is proved.