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Description
In this study, the specific activities of natural radionuclides in 22 rice cultivated soils collected from 5 districts in Nakhon Si Thammarat province, southern Thailand were measured. The measurements were conducted using a high-purity germanium (HPGe) detector and gamma spectrometer at Thailand Institute of Nuclear Technology (Public Organization). The specific activities of 238U, 232Th, and 40K were in the ranges of 26.60-174.45, 47.71-168.98, and 149.69-701.33 Bq/kg with mean values of 82.49, 121.09, and 435.53 Bq/kg, respectively. The values of radium equivalent activity (Raeq), the external hazard index (Hex), the gamma-absorbed dose rate (D) and the annual effective dose rate (AEDR) were also calculated in order to evaluate radiological hazards in rice cultivated soils in Nakhon Si Thammarat province.
