Title: EFFECT OF NEUTRON INTERACTIONS WITH BLAST AND THERMAL SHIELDS ON MEASURED GAMMA DOSE
Abstract: Research is presented on the neutron effects on gamma detectors. An evaluation was made of the gamma dose re sulting from neutron interaction with blast and thermal shields used to protect or support gamma detectors. The three sources of gamma rays from the shielding material were considered to be: gamma rays resulting from radiative capture of thermal neutrons; gamma rays resulting from inelastic scattering of neutrons; and gamma rays resulting from the decay of the radioactive daughters induced in the shields. Methods of predicting the gamma dose from these interactions are presented with sample calculations utilizing the prediction methods. Based upon examples presented neutron interactions with blast and thermal shields can contribute significantly to initlal gamma measurements. The capture gamma dose is the most important contributor. Experimental and calculated capture gamma doses for two types of shield agreed within 4%. The induced activity contribution is negligible. (auth)
Publication Year: 1961
Publication Date: 1961-11-01
Language: en
Type: article
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