HotSpotter? Neutron/Gamma Detector

Bell, Z. W.

Oak Ridge Y-12 Plant

关键词: Efficiency;    Neutrons;    Cadmium;    72 Physics Of Elementary Particles And Fields;    Sensitivity;   

DOI  :  10.2172/810878
RP-ID  :  Y/DX-2534
RP-ID  :  AC05-00OR-22800
RP-ID  :  810878

美国|英语

来源: UNT Digital Library

【 摘 要 】

The HotSpotter{trademark} Neutron/Gamma Detector combines in a single detecting module high sensitivity to gamma rays up to 3 MeV and sensitivity to neutrons. Using a 15 mm cubic CdWO{sub 4} (cadmium tungstate) crystal mounted on a 25 mm photomultiplier, the instrument realizes a factor of 5 increased photopeak efficiency over NaI(Tl) at 1 MeV, and a factor of 2 improvement over CsI(Tl). The addition of a 0.5 mm layer of {sup 10}B- impregnated epoxy covering the crystal provides neutron sensitivity without sacrificing gamma ray spectroscopic characteristics. Neutrons are detected by the presence of the 478 keV gamma from the {sup 10}B(n,{alpha}){sup 7}Li* reaction. In this paper, we describe the electronics and software of the instrument, and some of its characteristics.