Measurement and Analysis of Specific Activities of Natural Radionuclides (40K, 226Ra and 232Th) in Thai Rice Bag Samples

Abstract

Specific activity of natural radionuclides (40K, 226Ra and 232Th) in 30 Thai rice bag samples, have been measured and analyzed. Experimental results were obtained by using a high–purity germanium (HPGe) detector and gamma spectrometry analysis system at Nuclear and Material Physics laboratory in Department of Physics, Faculty of Science, Thaksin University, Songkhla Campus. It was found that specific activities ranged from 129.44 – 1361.09 Bq/kg, 2.78–9.63 Bq/kg and 48.50–107.14 Bq/kg with mean values of 462.75 ± 144.03 Bq/kg, 5.53 ± 2.54 Bq/kg and 75.17 ± 39.39 Bq/kg, respectively. Moreover, the results were also compared with the Office of Atoms for Peace (OAP) annual report data and Thailand research data.