Study on measurement of fission product nuclide 126Sn by AMS
Study on measurement of fission product nuclide 126Sn by AMS
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DOI：
10.1016/j.nimb.2010.11.059
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发表时间：
2011-02-01
影响因子：
1.3
通讯作者：
Wu, Shaoyong
中科院分区：
文献类型：
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作者：
Shen, Hongtao;Jiang, Shan;Wu, Shaoyong
提出了一种测量锡-126原子吸收光谱的新方法。该方法的主要特点包括制备SnF2样品，以SnF2为靶材，选择SnF3分子离子进行AMS测量，以及利用伽马能谱测定的Sn128样品对我们的北京HI-13 AMS测量进行定量校准。结果表明，当样品的质量分数为10(-8)~(-9)时，用伽马能谱方法标定的样品的相对不确定度优于4%。SnF2/SnF3-(靶样品、选择离子)的组合可以获得高达400nA的Sn126束流，而Te-126的干扰减少了2-3个数量级。用三个标准样品(用伽马能谱校正的样品稀释)获得了实测值与标称值之间的完美线性关系(R2=0.99975)，其比值分别为1.033×10~(-8)、4.54×10~(-9)、6.43×10~(-10)。通过对空白样品的测量，获得了(1.92+/-1.13)×10(-10)(锡-126/锡)的灵敏度。(C)2010爱思唯尔B.V.保留所有权利。
A new method was developed for AMS measurement of Sn-126. Major features of the method include the preparation of SnF2 samples, the use of SnF2 as target material, the selection of SnF3- molecular ions for the AMS measurements, and the quantitative calibration of our Beijing HI-13 AMS measurements by using samples with Sn-128 determined by gamma-ray spectrometry. The results indicate that the relative uncertainty of the Sn-128/Sn calibrated by gamma-ray spectrometry is better than 4% for samples with Sn-128/Sn of 10(-8) to (-9). A beam current of Sn-126 up to 400 nA can be obtained by the combination of SnF2/SnF3- (target sample, selected ions), while Te-126 interference was reduced by 2-3 orders of magnitude. A perfect linearity (R-2 = 0.99975) between measured and nominal Sn-126/Sn values was obtained by using three standard samples (diluted from the one calibrated by gamma-ray spectrometry) with Sn-126/Sn ratios of 1.033 x 10(-8), 4.54 x 10(-9), 6.43 x 10-(10), respectively. A sensitivity of (1.92 +/- 1.13) x 10(-10) (Sn-126/Sn) has been reached by measuring a blank sample. (C) 2010 Elsevier B.V. All rights reserved.