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„µ¦˜¦ª‹ª´—‡nµ„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³ °Šœ·ªÅ‡¨—r¦´Š¸›¦¦¤µ˜· (238U 232 Th 226 Ra ¨³ 40K)
¨³š¸É ¤œ»¬¥r ¦oµŠ ¹Ê œ (137 Cs) Ĝ—·œ‹µ„‹´Š®ª´ —Š ¨µ (ž¦³Áš«Åš¥)
Measurement of Specific Activity of Natural (238 U, 232Th, 226 Ra and 40K) and Anthropogenic
Radionuclides ( 137Cs) in Soil from Songkhla Province (Thailand)
´¥ª´•œr ¦´˜œÎµÁœ¸¥Š 1 »·œ °» —¤¤¡¦2 «»£ª»•· ÁÈ‹„»¨3¨³ž¦³Š‡r Á„¬¦µ›·‡»–4*
Chaiwat Ratanasumeniang 1, Suchin Udomsomporn2, Supphawut Benjakul3 and Prasong Kessaratikoon4*
š‡´—¥n°
šÎ µ„µ¦˜¦ª‹ª´—ž¦·¤µ–„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³ °Šœ·ªÅ‡¨—r¦´Š¸Äœ›¦¦¤µ˜·( 238U 232Th 226 Ra ¨³ 40K) ¨³
š¸É ¤œ»¬¥r ¦oµŠ ¹Êœ ( 137Cs) Ĝ˜´ª°¥nµŠ—·œ‹Îµœªœ 160 ˜´ª°¥nµŠš¸ÉÁ„È ‹µ„¦·Áª–16 °ÎµÁ£° °Š‹´ Š®ª´—Š ¨µ ץčo
®´ ªª´—¦´ Š¸ Á‹°¦r ¤µÁœ¸ ¥¤¦· » š›·Í (HPGe)¨³¦³ª·Á‡¦µ³®r Â„¤¤µÁž„ئÁ¤˜¦¸ š¸É ¤¸Äo °¥¼n –
®o °Šž’·´˜·„µ¦¢d ·„rœ· ªÁ‡¨¸¥¦r¨³¢d ·„rª´ —» £µ‡ª·µ¢d ·„r ‡–³ª· š¥µ«µ˜¦r ¤®µª·š¥µ¨´ ¥š´„¬·– Î µ®¦´„µ¦
ž¦´Áš¸¥Á‡¦ºÉ°Š¤º°Â¨³¦³„µ¦˜¦ª‹ª´—¦´ Š¸Äo ®¨nŠ„εÁœ·—¦´ Š¸¤µ˜¦“µœŽ¸ÁŽ¸¥¤-137 (Cs-137) ǝ°¨šr- 60
(Co-60) ¨³ÂÁ¦¸¥¤-133 (Ba-133) čo µ¦¤µ˜¦“µœ KCL IAEA/RGU-1 ¨³ IAEA/RGTh-1 Ĝ„µ¦‡Îµœª–‡n µ„´¤
¤´œ˜£µ¡‹Î µÁ¡µ³ °Š 40K 238U (®¦º ° 226 Ra) ¨³232 Th ˜µ¤¨Îµ—´ ¨³Äo µ¦¤µ˜¦“µœ IAEA/SL-2 Ĝ„µ¦‡Îµœª–®µ
‡nµ„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³ °Š 137Cs Ĝ˜´ ª°¥nµŠ—·œš´ÊŠ®¤— ץčoÁª¨µÄœ„µ¦˜¦ª‹ª´—‡nµ„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³Äœ˜´ª°¥n µŠ
—·œÂ˜n¨³˜´ ª°¥nµŠÁšnµ„´ 10800 ª·œµš¸®¦º ° 3 ´ÉªÃ¤Š ¡ªn µ ‡nµ„´¤¤´œ˜£µ¡¦´Š¸‹ÎµÁ¡µ³ °Š 40K 226 Ra 232Th ¨³
137 Cs š¸É˜¦ª‹ª´—Å—oĜ˜´ ª°¥nµŠ—·œ ¤¸‡nµ¡· ´¥°¥¼n ĜnªŠ 279.40 – 17523.33 Bq/kg Î µ®¦´ 40K 1.19 - 997.27 Bq/kg
宦´ 226Ra 3.84 – 192.98 Bq/kg 宦´ 232 Th ¨³ 0.00 – 24.58 Bq/kg 宦´ 137Cs ¨³¤¸ ‡nµÁŒ¨¸É¥Áž}œ
3149.26 ± 214.09 Bq/kg 99.48 ± 6.64 Bq/kg 54.19 ± 5.06 Bq/kg ¨³ 1.50 ± 0.76 Bq/kg ˜µ¤¨Îµ—´ œ°„‹µ„œ¸Ê
¥´ŠÅ—o ‡Îµœª–‡nµ°´˜¦µž¦·¤µ–¦´Š¸Â„¤¤µ—¼—„¨ºœ(D) ‡n µ„´¤¤´œ˜£µ¡¦´Š¸ ¤¤¼¨ °ŠÁ¦Á—¸¥¤(Raeq ) ‡nµ—´œ¸ ª´—‡ªµ¤
Á¸É¥Š¦´Š¸š¸Éŗo ¦´‹µ„£µ¥œ°„¦nµŠ„µ¥ (Hex)¨³‡nµž¦·¤µ–¦´ Š¸¥´ŠŸ¨š¸Éŗo ¦´‹µ„£µ¥œ°„¦n µŠ„µ¥ž¦³‹Îµže(AEDout)Ĝ
¦· Áª–‹´Š®ª´—Š ¨µ ץčo o°¤¼¨ °Š‡nµ„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³ °Š40K 226Ra ¨³ 232 Th š¸É˜¦ª‹ª´ —Å—oœ¸Ê ¡ªnµ¤¸‡nµ
¡· ´¥Áž}œ 88.63 - 416.67 nGy/h 177.77 - 807.51 Bq/kg 0.48 – 2.18 ¨³ 0.11 - 0.51 mSv/y ˜µ¤¨Îµ—´ ¨³¤¸ ‡nµ
1 œ· ·˜¦³—´ž¦·µÃš µ µª·µ¢d ·„r ‡–³ª·š¥µ«µ˜¦r ¤®µª·š¥µ¨´¥š´„¬·– ª·š¥µÁ ˜Š ¨µ 90000
1 Graduate Student, Department of Physics, Faculty of Science, Thaksin University, Songkhla, 90000
2 œ´„ª·š¥µ«µ˜¦rœ·ªÁ‡¨¸¥¦r εœ´„Šµœž¦¤µ–¼Á¡ºÉ°´œ˜· 16 ™œœª·£µª—¸¦´Š·˜ Á ˜‹˜»‹´„¦ „¦»ŠÁš¡² 10900
2 Nuclear Scientist, Office of Atoms for Peace, 16 Vibhavadi Rangsit Rd, Chatuchak, Bangkok, 10900.
3 Ÿ¼onª¥ª·‹´¥ µ µª·µ¢d ·„r ‡–³ª·š¥µ«µ˜¦r ¤®µª· š¥µ¨´¥š´„¬·– °. Á¤º°Š ‹. Š ¨µ 90000
3 Research Assistant, Department of Physics, Faculty of Science, Thaksin University, Songkhla, 90000
4 °µ‹µ¦¥r —¦. µ µª·µ¢d ·„r ‡–³ª·š¥µ«µ˜¦r ¤®µª·š¥µ¨´¥š´„¬·– °. Á¤º°Š ‹. Š ¨µ 90000
4 Dr., Department of Physics, Faculty of Science, Thaksin University, Songkhla, 90000.
Corresponding author : Ú¦«´¡šr : 081-5423598 E-mail: prasong@tsu.ac.th