Development of neutron shields for gamma-ray detectors

Jaesub Hong; Charles J. Hailey; William W. Craig

doi:10.1117/12.330270

10 November 1998 Development of neutron shields for gamma-ray detectors

Jaesub Hong, Charles J. Hailey, William W. Craig

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Proceedings Volume 3445, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX; (1998) https://doi.org/10.1117/12.330270
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

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.

Citation Download Citation

Jaesub Hong, Charles J. Hailey, and William W. Craig "Development of neutron shields for gamma-ray detectors", Proc. SPIE 3445, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX, (10 November 1998); https://doi.org/10.1117/12.330270

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KEYWORDS

Sensors

Target detection

Spectroscopy

Cadmium

Particles

Electronics

Monte Carlo methods

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