Radiation Portal Monitor
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Radiation Portal Monitors (RPMs) are passive radiation detection devices used for the screening of vehicles or other cross-border vectors. Fear of terrorist attacks with radiological weapons spurred RPM deployment for cargo scanning since 9/11, particularly in the United States. RPMs are designed to detect ionizing radiation sufficiently penetrating to escape from a container. In most cases gamma radiation is detected, in some cases complemented by neutron detection…mehr

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Radiation Portal Monitors (RPMs) are passive radiation detection devices used for the screening of vehicles or other cross-border vectors. Fear of terrorist attacks with radiological weapons spurred RPM deployment for cargo scanning since 9/11, particularly in the United States. RPMs are designed to detect ionizing radiation sufficiently penetrating to escape from a container. In most cases gamma radiation is detected, in some cases complemented by neutron detection when sensitivity for nuclear material is desired. First generation RPMs often rely on PVT scintillators for gamma counting. They provide very little information on energy of detected photons, and as a result, they were criticized for their inability to distinguish gammas originating from nuclear sources from gammas originating from a large variety of benign cargo types that naturally emit radioactivity, including bananas, cat litter, granite, porcelain, stoneware, etc.