เอกสารการประชุมวิชาการและเสนอผลงานวิจัย มหาวิทยาลัยทักษิณ ครั้งที่ 19 2552 - page 79

„µ¦ž¦³»¤ª·µ„µ¦Â¨³Áœ°Ÿ¨Šµœª·‹´¥ ¤®µª·š¥µ¨´¥š´„¬·– ‡¦´ÊŠš¸É 19 ž¦³‹Îµže 2552
mean values are 76.48 ± 3.38 Bq/kg for Radium-226, 84.38 ± 4.53 Bq/kg for Thorium-232 and 384.85 ± 23.30
Bq/kg for Potassium-40 with ranges of 16.35 – 889.99 Bq/kg, 0.47 – 298.18 Bq/kg and 58.23 – 1425.73 Bq/kg,
respectively. The specific activities of these radionuclides were also compared with Office of Atoms for Peace
(OAP) research data, Thailand and global radioactivity measurements and evaluations. Furthermore, radioactive
contour maps of all specific activities of Radium-226, Thorium-232 and Potassium-40 in soil samples from Trang
province were created by using computer program ArcGIS.
Keywords: specific activities, radioactive contour map, high-purity germanium detector (HPGe), gamma
spectrometry analysis system
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