Frequency distribution of specific activities and radiological hazard assessment in surface beach sand samples collected from Pattaya beach in Chonburi province, Thailand
- Nopparit Changkit, Graduate Student, Department of Physics, Faculty of Science, Thaksin University, Phatthalung Campus, Paphayom, Phatthalung, Thailand
- Prasong Kessaratikoon, Nuclear and Material Physics Research Unit (NuMPRU), Department of Basic Science and Mathematics, Faculty of Science, Thaksin University, Songkhla Campus, Muang, Songkhla, Thailand , Corresponding author; E-mail: firstname.lastname@example.org
- Ruthairat Boonkrongcheep, Nuclear and Material Physics Research Unit (NuMPRU), Department of Basic Science and Mathematics, Faculty of Science, Thaksin University, Songkhla Campus, Muang, Songkhla, Thailand
- Udorn Youngchuay, Thailand Institute of Nuclear Technology (Public Organization) (TINT), Ongkharak, Nakorn Nayok, Thailand
- Sittipong Polthum, Thailand Institute of Nuclear Technology (Public Organization) (TINT), Ongkharak, Nakorn Nayok, Thailand
We measured and analyzed the specific activities of 40K, 226Ra, and 232Th in 70 surface beach sand samples collected along the Pattaya beach in Chonburi province, Thailand. The results from this study were carried out by using a high-purity germanium (HPGe) detector and low background gamma-ray spectrometry which were set-up at the advanced laboratory at Thailand Institute of Nuclear Technology (Public Organization) or TINT. The specific activities level of 40K, 226Ra, and 232Th were found to lie in the range of 108.85 - 584.78, 4.56 - 56.98, and 4.45 - 79.17 Bq/kg with average values of 228.62 ± 9.08, 12.05 ± 0.71, 13.65 ± 1.03 Bq/kg, respectively. The frequency distribution of the specific activities of 40K, 226Ra, and 232Th were studied and found to be the asymmetrical distribution by using a special computer program. Hence, the median values of specific activities of 40K, 226Ra, and 232Th which were 214.65 ± 9.00, 8.43 ± 0.64, 8.94 ± 0.90 Bq/kg respectively, should be selected to be used for further studying. We also studied and calculated four radiological hazard indices for the investigated area by using these median values. Furthermore, the studied results were used to compare with some studies and literatures around the world in both national and international level. Moreover, the radioactive contour maps (RCM) of the studied area were also originated and shown in this study.
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