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A method of determination for 93Zr/92Zr ratio by multi-collector inductively plasma mass spectrometry (MC-ICP-MS) was described in this paper. A 93Zr/92Zr ratio of (2.75±0.07)×10-5 was obtained in the original sample for AMS measurement and its relative standard error was 2.5%. Considered the contribute of above-thermal neutron, a calculated 93Zr/92Zr ratio of 2.56×10-5 was obtained and it was according with measurement of the result. The results showed that it can be used for AMS measurement standards sample preparation. A series 93Zr standards sample for AMS measurement were diluted by irradiated sample with enriched 92Zr. 相似文献
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Using liquid scintillation counting (LSC) to determine the ratio of 79Se/78Se in the irradiated sample was reported. Firstly, the γ and β spectrum of irradiated sample was measured to find out the interferefering nuclide. Then, the irradiated sample was heated up to remove the interferefering nuclide from the sample as much as possible. At last, the activity 79Se was determined by LSC, and the ratio of 79Se/78Se was determined to be (5.44±0.23)×10-5. It provides reliable standard sample for AMS measurement. 相似文献
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By using HPGe γ-ray spectrometry, the activity of the long-lived fission product 126Sn was measured. The number of 126Sn atoms and the isotopic abundance of 126Sn/Sn were calculated based on the half-life value of 2.35×105 a. The result of the isotopic abundance, (1.037±0.044)×10-8, is consistent with the results measured by the accelerator mass spectrometry (AMS) within uncertainty limits, that confirms our procedures in the measurement of 126Sn by AMS and lays a foundation for the AMS measurement of 126Sn at much lower levels. 相似文献
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