Thermal neutron scintillation detector with background gamma-ray shielding

摘要

A thermal neutron detector comprises an inorganic scintillation crystal (34), an inner sleeve on said scintillation crystal and including boron-10, and an outer lead sleeve on said inner sleeve for shielding gamma rays from the inner layer (36). The boron-10 may be carried in a resiliently compressible silicone cast on the crystal to form a sleeve which functions to mechanically support the crystal inside a detector casing (44). The resiliently compressible, thermal neutron absorbing layer may also be used in other applications as a thermal neutron shield.