Coated Fiber Neutron Detector Test

Lintereur, Azaree T. ; Ely, James H. ; Kouzes, Richard T. ; Stromswold, David C.

关键词: AVAILABILITY;    EFFICIENCY;    FIBERS;    FISSION NEUTRONS;    MONITORS;    NEUTRON DETECTION;    NEUTRON DETECTORS;    NEUTRONS;    PERFORMANCE;    PLASTICS;    PLUTONIUM;    PROPORTIONAL COUNTERS;    RADIATIONS;    SENSITIVITY;    TESTING neutron detection;    scintillating fibers;   

DOI  :  10.2172/969176
RP-ID  :  PNNL-18919
PID  :  OSTI ID: 969176
Others  :  TRN: US1000259

学科分类：物理（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

Radiation portal monitors used for interdiction of illicit materials at borders include highly sensitive neutron detection systems. The main reason for having neutron detection capability is to detect fission neutrons from plutonium. The currently deployed radiation portal monitors (RPMs) from Ludlum and Science Applications International Corporation (SAIC) use neutron detectors based upon 3He-filled gas proportional counters, which are the most common large neutron detector. There is a declining supply of 3He in the world, and thus, methods to reduce the use of this gas in RPMs with minimal changes to the current system designs and sensitivity to cargo-borne neutrons are being investigated. Reported here are the results of tests of the 6Li/ZnS(Ag)-coated non-scintillating plastic fibers option. This testing measured the required performance for neutron detection efficiency and gamma ray rejection capabilities of a system manufactured by Innovative American Technology (IAT).