A preliminary study of small-mass radiocarbon sample measurement at Xi'an-AMS
A preliminary study of small-mass radiocarbon sample measurement at Xi'an-AMS
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DOI：
10.1088/1674-1137/39/3/036202
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发表时间：
2014-09
影响因子：
3.6
通讯作者：
Fu Yun-chong;Zhou Wei-jian;Du Hua;Cheng Peng;Zhao Xiao-Lei;L. Qi;Lu Xue-Feng;Zhao Wen-nian
中科院分区：
文献类型：
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作者：
Fu Yun-chong;Zhou Wei-jian;Du Hua;Cheng Peng;Zhao Xiao-Lei;L. Qi;Lu Xue-Feng;Zhao Wen-nian
为了满足日益显着的小质量放射性碳（碳含量10×6 g级）的测量需求，西安AMS对现有的加样方法进行了改进，对原有SO-110型号的Cs溅射离子源进行了升级。为了研究西安AMS小质量样品的可行性并评价现有H2/Fe和Zn/Fe常规体系的放射性碳样品制备能力，对四种不同方法制备的小质量样品进行了测试。它们是质量分割法、质量稀释法、H2/Fe还原法和Zn/Fe还原法。结果表明，使用现有的Zn/Fe体系可以制备25μg以上的碳质量，但使用现有的H2/Fe体系需要不低于100μg/s，并且可以改进。这表明西安-AMS现在能够分析小质量放射性碳样品。
To meet the measurement demands on small-mass radiocarbon (carbon content at 10 �6 g level) which are becoming increasingly significant, Xi'an-AMS has made improvements to the existing method of sample loading and has upgraded the Cs sputter ion source from the original SO-110 model. In order to study the feasibility of small-mass samples in Xi'an-AMS and evaluate the radiocarbon sample preparation ability using existing routine systems of H2/Fe and Zn/Fe, the small-mass samples prepared by four different methods are tested. They are the mass division method, mass dilution method, H2/Fe reduction method and Zn/Fe reduction method. The results show that carbon mass above 25 µg can be prepared using the existing Zn/Fe system, but no less than 100 µ gi s required using the existing H2/Fe system, which can be improved. This indicates Xi'an-AMS are now able to analyze small-mass radiocarbon samples.