Natural radioactivity and its gamma dose rate in Mission (Texas) soils

Document Type

Article

Publication Date

5-24-2012

Abstract

The activity concentration of radionuclides in 238U, 232Th, and 40K were determined in Mission (Texas) surface soils through gamma-ray spectrometry measurements using hyper pure germanium detector. Activity concentrations of 238U, 232Th, and 40K were 13–32 Bq kg−1 (mean value: 23 Bq kg−1), 17–47 Bq kg−1 (mean value: 31 Bq kg−1), and 100–460 Bq kg−1 (mean value: 300 Bq kg−1) respectively. The absorbed gamma dose rate in air from these soils were found in the range of 23 to 56 nGy h−1 with an average value of 42 nGy h−1. The contribution to the absorbed gamma dose rate in air was observed as 26 % from 238U, 45 % from 232Th, and 29 % from 40K. The outdoor annual effective dose equivalent varied between 28 and 69 μSv y−1 with the mean value of 52 μSv y−1.The evaluated data were compared with the data from different countries and also with the world mean value.

Comments

Copyright © 2012, Akadémiai Kiadó, Budapest, Hungary. https://rdcu.be/cNFy8

Publication Title

Journal of Radioanalytical and Nuclear Chemistry

DOI

10.1007/s10967-012-1840-9

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