Development of neutron shields for gamma-ray detectors

Details Development of neutron shields for gamma-ray detectors Development of neutron shields for gamma-ray detectors

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3445..121h&link_type=abstract

Proc. SPIE Vol. 3445, p. 121-131, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX, Oswald H. Siegmund; Mark A. Gummin

Astronomy and Astrophysics

Astronomy

Scientific paper

The importance of shields for suppressing neutron-induced background in new classes of (gamma) -ray detectors such as CZT has been emphasized for a variety of reasons. These include high cross-sections for neutron interactions in detector materials and inefficient vetoing of neutrons in conventional active shields. We previously demonstrated through Monte-Carlo simulation how our new approach, supershields, is superior to the monolithic, biatomic neutron shields which have been developed in the past. Here we show the construction of several prototype models for supershields using B and H. We verify the performance of these supershields through lab experiments using radioactive sources and monoenergetic neutron beam at the Radiological Research Accelerator Facility, and compare the results with monolithic neutron shields. We also discuss the implications of this experiment for designs of supershields in general.

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