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

Document Type


Publication Date



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.


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

Publication Title

Journal of Radioanalytical and Nuclear Chemistry