Application of PXAMS technique for 36Cl analysis in soil collected at Semipalatinsk Nuclear Test Site |
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| Authors: | S Tolmachyov S Mitarai N Momoshima M Yamamoto Y Maeda T Nakashima |
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| Institution: | (1) Graduate School of Sciences, Kyushu University, 6-10-1, Hakozaki, Higashi-ku, Fukuoka, 812-8581, Japan;(2) Kyushu University Tandem Laboratory, Faculty of Science, Kyushu University, 6-10-1, Hakozaki, Higashi-ku, Fukuoka, 812-8581, Japan;(3) Department of Environmental Science, Kumamoto University, 2-39-1, Kurokami, Kumamoto, 860-8555, Japan;(4) Low-Level Radioactivity Laboratory, Kanazawa University Tatsunokuchi, Ishikawa, 923-1224, Japan |
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| Abstract: | 36Cl in soil samples from the Semipalatinsk Nuclear Test Site (former USSR) was measured at Kyushu University Tandem Laboratory (KUTL) by accelerator mass spectrometry (AMS) coupled with projectile X-ray detection (PXD) technique. The separation of competing 36S and 36Cl atomic isobars, was satisfactory by PXD technique. Measured 36Cl/Cl atom ratio was (5.0±0.6).10–10 and an average activity of 36Cl was calculated as (2.0±0.2) mBq/g, which is in a good agreement with that obtained by liquid scintillation counting (LSC) method previously. Currently developed AMS system at the Kyushu University can be applied for routine 36Cl analysis at 36Cl/Cl = 10–11 atom ratio level. |
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