Assessment of Specific Activities and Radiation Hazard Indices of Natural Radionuclides in Soil Based Building Materials in Southern Part of Yala Province
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Abstract
This research aimed to assess specific activities and radiation hazard indices of natural radionuclides in soil based building materials in southern part of Yala province. Soil-based building material samples were collected from 41 points in schools located in Bannang Sata, Than To and Betong districts. The specific activities of natural radionuclides were assessed by gamma-ray spectrometry using a high purity germanium detector. The assessed radiation hazard indices included radium equivalent activity (Raeq), external hazard index (Hex), absorbed dose rate in air (D), annual effective dose rate (E) and excess life time cancer risk (ELCR). From the study, it was found that the average specific activities of Ra-226, Th-232 and K-40 were of 261.88±117.42, 307.25±108.48 and 2388.13±939.32 Becquerel per kilogram, respectively, which were higher than the average values of Thailand and the global average values. Furthermore, Raeq, Hex, D, E and ELCR obtained from this study were higher than the thresholds set by United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR). The results indicated that people living in the studied areas were at risk of cancer from long-term exposure to natural radionuclides in building materials.
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บทความที่ได้รับการตีพิมพ์เป็นลิขสิทธิ์ของ วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยอุบลราชธานี
ข้อความที่ปรากฏในบทความแต่ละเรื่องในวารสารวิชาการเล่มนี้เป็นความคิดเห็นส่วนตัวของผู้เขียนแต่ละท่านไม่เกี่ยวข้องกับมหาวิทยาลัยอุบลราชธานี และคณาจารย์ท่านอื่นๆในมหาวิทยาลัยฯ แต่อย่างใด ความรับผิดชอบองค์ประกอบทั้งหมดของบทความแต่ละเรื่องเป็นของผู้เขียนแต่ละท่าน หากมีความผิดพลาดใดๆ ผู้เขียนแต่ละท่านจะรับผิดชอบบทความของตนเองแต่ผู้เดียว
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