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Title: Monte Carlo simulations of the gamma-ray exposure rates of common rocks

Monte Carlo simulations have been performed to model the gamma ray emission and attenuation properties of common rocks. In geologic materials, 40K, 238U, and 232Th are responsible for most gamma ray production. If the concentration of these radioelements and attenuation factors such as degree of water saturation are known, an estimate of the gamma-ray exposure rate can be made. The results show that there are no significant differences in gamma-ray screening between major rock types. If the total number of radionuclide atoms are held constant then the major controlling factor is density of the rock. Lastly, the thickness of regolith or soil overlying rock can be estimated by modeling the exposure rate if the radionuclide contents of both materials are known.
Authors:
ORCiD logo [1] ;  [2] ; ORCiD logo [3]
  1. Univ. of Nevada, Las Vegas, NV (United States); National Security Technologies, Las Vegas, NV (United States)
  2. National Security Technologies, Las Vegas, NV (United States)
  3. Univ. of Nevada, Las Vegas, NV (United States)
Publication Date:
Grant/Contract Number:
NA0001982
Type:
Published Article
Journal Name:
Journal of Environmental Radioactivity
Additional Journal Information:
Journal Volume: 167; Journal Issue: C; Journal ID: ISSN 0265-931X
Publisher:
Elsevier
Research Org:
Board of Regents Nevada System of Higher Education, Las Vegas, NV (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Exposure rate coefficients; Geology; Naturally occurring radionuclides; Aerial gamma ray survey
OSTI Identifier:
1333431
Alternate Identifier(s):
OSTI ID: 1422207