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„µ¦˜¦ª‹ª´—‡nµ„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³ °Šœ·ªÅ‡¨—r¦´Š¸›¦¦¤µ˜· (238U 232 Th 226 Ra ¨³ 40 K) ¨³š¸É
¤œ» ¬¥r ¦oµŠ ¹Êœ (137Cs) Ĝ—·œ‹µ„ 6 °ÎµÁ£° °Š‹´Š®ª´—¡´š¨» Š (ž¦³Áš«Åš¥)
ץčoÁš‡œ·‡Â„¤¤µÁž„ئÁ¤˜¦¸
Measurement of Specific Activity of Natural (238U, 232Th,226Ra and 40K) and Anthropogenic
Radionuclides (137Cs) in Soil from 6 Districts in Phathalung Province (Thailand)
using Gamma Ray Spectrometry
¤¼¦–¸ —µÃ°³1 »·œ °»—¤¤¡¦2 «»£ª»•· ÁÈ‹„»¨3 ¨³ ž¦³Š‡r Á„¬¦µ›·‡»–4*
Muranee Daoh1 Suchin Udomsomporn 2 Supphawut Benjakul3 and Prasong Kessaratikoon4*
š‡´—¥n °
ŗošÎµ„µ¦˜¦ª‹ª´—¨³ª· Á‡¦µ³®r‡nµ„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³ °Š 238 U 232Th 226Ra 40K ¨³ 137Cs Ĝ˜´ ª°¥nµŠ—·œ
š¸ÉÁ„ȝ‹µ„¦·Áª–˜nµŠ Ç Äœ 6 °Î µÁ£° ‹Îµœªœ 69 ˜´ª°¥nµŠ (°ÎµÁ£°žiµ¡³¥°¤ °ÎµÁ£°«¦¸¦¦¡˜ °Î µÁ£°‡ªœ œ»œ °ÎµÁ£°
«¦¸œ‡¦·œš¦r °ÎµÁ£°Á¤º°Š ¨³°ÎµÁ£°„Š®¦µ) °Š‹´Š®ª´—¡´ š¨»Š ץčo®´ªª´—¦´ Š¸ÂÁ‹°¦r¤µÁœ¸¥¤¦· »š›·Í¨³¦³
ª·Á‡¦µ³®r Â„¤¤µÁž„ئÁ¤˜¦¸ – ®o °Šž’· ´˜·„µ¦¢d ·„r œ·ªÁ‡¨¸¥¦r ¨³¢d ·„r ª´ —» µ µª·µ¢d · „r ‡–³
ª·š¥µ«µ˜¦r ¤®µª·š¥µ¨´¥š´„¬·– ª·š¥µÁ ˜Š ¨µ čo®¨nŠ„εÁœ·—¦´ Š¸¤µ˜¦“µœ Ž¸ÁŽ¸¥¤-137 (Cs-137) ǝ°¨šr-60
(Co-60) ¨³ÂÁ¦¸¥¤-133 (Ba-133) Ĝ„µ¦ž¦´ Áš¸¥¡¨´ŠŠµœ čo µ¦¤µ˜¦“µœœ·— KCl IAEA/RGU–1 ¨³
IAEA/RGTh–1 Ĝ„µ¦‡Îµœª–‡nµ„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³ °Š 40K 238U (®¦º° 226 Ra) ¨³232Th ˜µ¤¨Îµ—´ ¨³Äo µ¦
¤µ˜¦“µœ IAEA/SL-2 Ĝ„µ¦‡Îµœª–®µ‡nµ„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³ °Š 137 Cs Ĝ˜´ª°¥nµŠ—·œš´ÊŠ®¤— Ĝ„µ¦˜¦ª‹ª´ —˜n
¨³˜´ª°¥nµŠÄo Áª¨µÁž}œ 10,800 ª·œµš¸ ‹µ„Ÿ¨„µ¦ª·Á‡¦µ³®r ‡nµ„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³ÁŒ¨¸É¥ °Š 40K 226 Ra 232 Th ¨³
137Cs Ĝ˜´ª°¥n µŠ—·œ ¡ªnµ ¤¸‡nµ¡· ´¥°¥¼n ĜnªŠ 148.17-11276.78 Bq/kg 宦´ 40K 5.44-518.45 Bq/kg 宦´
226Ra 4.46-236.19 Bq/kg 宦´  232Th ¨³ 0.00-12.39 Bq/kg Î µ®¦´ 137Cs ¤¸ ‡nµÁŒ¨¸É¥Áž}œ 4512.95 ± 226.71
Bq/kg 153.12 ± 7.20Bq/kg 86.36 ± 5.76Bq/kg ¨³ 1.71 ± 0.80 Bq/kg ˜µ¤¨Îµ—´ œ°„‹µ„œ¸Ê¥´ŠÅ—o‡Îµœª–°´˜¦µ
ž¦·¤µ–¦´ Š¸—¼—„¨ºœÄœ°µ„µ« (D) ‡nµ„´¤¤´œ˜£µ¡¤¤¼¨Á¦Á—¸¥¤ (Raeq ) ‡nµ—´œ¸ ‡ªµ¤Á¸É¥Š¦´Š¸š¸É ŗo¦´‹µ„£µ¥œ°„
¦nµŠ„µ¥ (Hex ) ¨³‡nµž¦·¤µ–¦´Š¸¥´ŠŸ¨š¸Éŗo ¦´˜n°že (AEDout) Ž¹ÉŠÁž}œ‡nµš¸Éčož¦³Á¤· œ‡ªµ¤Á¸É¥Š °Š„µ¦Å—o¦´¦´Š¸‹µ„
œ·ªÅ‡¨—r„´¤¤´œ˜¦´Š¸›¦¦¤µ˜·°Šž¦³µœÃ—¥š´ÉªÅž ץčo o°¤¼¨ °Š‡nµÁŒ¨¸É ¥„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³ °Š 40K
226Ra ¨³ 232 Th Ĝ˜´ª°¥nµŠ—·œš¸É˜¦ª‹ª´—Å—o œ¸Ê ¨³¥´ ŠÅ—ošÎµ„µ¦Áž¦¸¥Áš¸ ¥ o°¤¼¨š¸Éŗoœ¸Ê„´ o°¤¼¨‹µ„¦µ¥Šµœ
ž¦³‹Îµže°ŠÎµœ´„Šµœž¦¤µ–¼Á¡ºÉ °´œ˜· Ÿ¨Šµœª· ‹´¥ °Šœ´„ª· ‹´¥Äœž¦³Áš«Åš¥Â¨³ o °¤¼¨ °Š„¨»n¤œ´„ª·‹´¥‹µ„
ž¦³Áš«˜nµŠ Ç š´ÉªÃ¨„°¸„—oª¥
1 œ· ·˜ž¦·µÃš ®¨´„¼˜¦ ªš.¤.(¢d ·„r) µ µª·µ¢d ·„r ‡–³ª·š¥µ«µ˜¦r ¤®µª·š¥µ¨´¥š´„¬·– Š ¨µ 90000
1 Graduate Student, Department of Physics, Faculty of Science, Thaksin University, Songkhla, 90000, Thailand.
2 εœ´„Šµœž¦¤µ–¼Á¡ºÉ°´œ˜· 16 ™œœª·£µª—¸¦´Š·˜  ªŠ¨µ—¥µª Á ˜‹˜»‹´„¦ „¦»ŠÁš¡² 10900
2Office of Atoms for Peace 16 Viphavadi Rangsit Road Kwang Ladyao Chatuchac District Bangkok 10900
3Ÿ¼onª¥ª·‹´ ¥ µ µª·µ¢d ·„r ‡–³ª·š¥µ«µ˜¦r ¤®µª·š¥µ¨´¥š´„¬·– °. Á¤º°Š ‹. Š ¨µ 90000