BF3 Neutron Detector Tests

[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; thus, methods to reduce the use of this gas in RPMs with minimal changes to the current system designs and detection capabilities are being investigated. Reported here are the results of tests of the efficiency of BF3 tubes at a pressure of 800 torr. These measurements were made partially to validate models of the RPM system that have been modified to simulate the performance of BF3-filled tubes. While BF3 could be a potential replacement for 3He, there are limitations to its use in deployed systems.

[发布日期] 2009-12-09

[学科分类] 物理（综合）

[关键词] AVAILABILITY;DETECTION;EFFICIENCY;FISSION NEUTRONS;MONITORS;NEUTRON DETECTION;NEUTRON DETECTORS;PERFORMANCE;PLUTONIUM;PROPORTIONAL COUNTERS;RADIATIONS neutron detection;alternate technology;boron trifluoride