เอกสารการประชุมวิชาการและเสนอผลงานวิจัย มหาวิทยาลัยทักษิณ ครั้งที่ 19 2552 - page 78

„µ¦ž¦³»¤ª·µ„µ¦Â¨³Áœ°Ÿ¨Šµœª·‹´¥ ¤®µª·š¥µ¨´¥š´„¬·– ‡¦´ÊŠš¸É 19 ž¦³‹Îµže 2552
‡n µ„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³Â¨³ÂŸœ£µ¡šµŠ¦´Š¸°ŠÁ¦Á—¸¥¤-226 (226Ra) š°Á¦¸¥¤-232 (232 Th)
¨³ÃžÂ˜ÁŽ¸¥¤-40 (40K) Ĝ˜´ ª°¥nµŠ—· œ¦·Áª–‹´Š®ª´—˜¦´Š, ž¦³Áš«Åš¥
Specific Activities and Radioactive Contour Maps of Radium-226 (226 Ra) Thrium-232 (232Th)
and Potassium-40 (40K) in Soil Samples from Trang Province, Thailand
«»£ª»•· ÁÈ‹„»¨1 Á‹œ‹·¦µ Šµ¤Á¡¸¥¦2 ®š´¥œ„ °»š´¥ ª´Â„o ª2 ¨³ ž¦³Š‡r Á„¬¦µ›·‡»–3*
Supphawut Benjakul1 Jenjira Ngampein2 Hathaichanok Uthaikwankeaw2 and Prasong Kessaratikoon3*
š‡´—¥n°
Šµœª·‹´¥œ¸Ê ŗo šÎµ„µ¦˜¦ª‹ª´—¨³ª·Á‡¦µ³®rž¦· ¤µ–„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³ °Šœ·ªÅ‡¨—r¦´Š¸Á¦·É ¤˜oœ Á¦Á—¸¥¤-226
(226 Ra) š°Á¦¸¥¤-232 (232Th) ¨³ÃžÂ˜ÁŽ¸ ¥¤-40 (40K) Ĝ˜´ª°¥n µŠ—·œ‹Îµœªœ 88 ˜´ª°¥nµŠš¸ÉÁ„ȝ‹µ„š» „˜Îµ¨Äœ 10
°ÎµÁ£° °Š‹´Š®ª´—˜¦´ŠÃ—¥Äo®´ ªª´—¦´Š¸ÂÁ‹°¦r¤µÁœ¸¥¤¦· »š›·Í¨³¦³ª·Á‡¦µ³®r Â„¤¤µÁž„ئÁ¤˜¦¸Â¨³
čo˜oœ„εÁœ·—¤µ˜¦“µœ—·œÂž¦·¤µ˜¦ IAEA 375-soil °Š™µ´œÁš‡ÃœÃ¨¥¸ œ·ªÁ‡¨¸ ¥¦r®nŠµ˜·(°Š‡r„µ¦¤®µœ)
Ĝ„µ¦Áž¦¸¥Áš¸¥Á¡ºÉ °„µ¦‡Îµœª–‡nµ„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³ ‹µ„Ÿ¨„µ¦š—¨°Šš¸Éŗo¡ªnµ‡nµ„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³ °Š
Á¦Á—¸¥¤-226 š°Á¦¸¥¤-232 ¨³ÃžÂ˜ÁŽ¸¥¤-40 ¤¸‡nµÁŒ¨¸É¥Áž}œ 76.48 ± 3.38 Bq/kg, 84.38 ± 4.53 Bq/kg ¨³ 384.85 ±
23.30 Bq/kg ˜µ¤¨Î µ—´ ¨³¤¸ ‡nµ¡· ´¥°¥¼n ¦³®ªnµŠ 16.35 – 889.99 Bq/kg 0.47 – 298.18 Bq/kg ¨³ 58.23 – 1425.73
Bq/kg ˜µ¤¨Îµ—´ ¨³Å—oœÎ µŸ¨š¸É‡Îµœª–Å—o œ¸Ê¤µÁž¦¸ ¥Áš¸¥„´  o°¤¼¨ °ŠÎ µœ´„Šµœž¦¤µ–¼Á¡ºÉ °´œ˜· o°¤¼¨ °Š
œ´ „ª·‹´ ¥Åš¥Â¨³ o°¤¼¨ °ŠŠµœª·‹´¥š´ÉªÃ¨„ œ°„‹µ„œ¸Ê¥´ŠÅ—o ¦oµŠÂŸœ£µ¡šµŠ¦´Š¸°Š‡nµ„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³ °Š
Á¦Á—¸ ¥¤-226 š°Á¦¸¥¤-232 ¨³ÃžÂ˜ÁŽ¸¥¤-40 ‹µ„ o °¤¼¨š¸É«¹„¬µÅ—o Ĝ˜´ª°¥nµŠ—·œ¦·Áª–‹´Š®ª´ —˜¦´ŠÃ—¥Äo
ަ„¦¤‡°¤¡·ªÁ˜°¦rArcGIS °¸ „—oª¥
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Áž„ئÁ¤˜¦¸
Abstract
Specific activities of primordial radionuclides Radium-226 ( 226Ra), Thorium-232 (232 Th) and Potassium-40
(40K) in 88 soil samples collected from every district in 10 amphurs of Trang province, were measured and
evaluated using a high-purity germanium (HPGe) detector and gamma spectrometry analysis system at Thailand
Institute of Nuclear Technology (Public Organization). The volume standard soil source (IAEA 375-soil) was used
to compare and calculate specific activities. From the experimental data, it was found that the specific activity
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2 œ· ·˜¦³—´ž¦·µ˜¦¸ ®¨´„¼˜¦ªš. (¢d ·„r) £µ‡ª·µ¢d ·„r ‡–³ª·š¥µ«µ˜¦r ¤®µª·š¥µ¨´¥š´„¬·– °. Á¤º °Š ‹. Š ¨µ 90000
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* Ú¦«´¡šr: 074 311885-7 ˜n° 2416,2413 ¤º°™º° 081-5423598 E-Mail:prasong@tsu.ac.th