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  • Title: Natural radioactivity levels of (226)RA and (40)K in soil of Zanjan province, Iran.
    Author: Saghatchi F, Salouti M, Eslami A, Sharafi A.
    Journal: Radiat Prot Dosimetry; 2010 Sep; 141(1):86-9. PubMed ID: 20484368.
    Abstract:
    Radioactivity concentration of naturally occurring radionuclides, (226)Ra and (40)K, in soil samples of Zanjan province, in north-west of Iran and from 21 geographical areas was measured by gamma spectrometry. The activity concentration of (226)Ra ranged from 58.4 + or - 1.8 to 132 + or - 3.1 Bq kg(-1) with the mean value of 88.5 + or - 22.9 Bq kg(-1). The activity concentration of (40)K ranged from 267 + or - 5.9 to 791 + or - 8.1 Bq kg(-1) with the mean value of 497.4 + or - 162.6 Bq kg(-1). The mean values for absorbed dose rate in air and annual effective dose were determined as 62.6 + or - 16.5 nGy h(-1) and 0.076 + or - 0.02 mSv, respectively.
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