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Improvements and Applications of AMS Radiocarbon Measurement at Peking University

  • Zhiyu Guo (a1), Kexin Liu (a1), Kun Li (a1), Jianjun Wang (a1), Bin Li (a1), Xiangyang Lu (a1), Chia-Erh Chen (a1), Tiemei Chen (a1), Sixun Yuan (a1) and Shijun Gao (a1)...

Abstract

AMS radiocarbon measurements were started at Peking University in 1992 with a modified HICONEX 834 ion source. Some archaeological samples were measured at a sensitivity of 10−14 with ca. 1.7% precision for modern samples. We have made many improvements in our first two years of operation: a high-intensity Cs sputtering ion source was installed; the graphite sample preparation technique was investigated; and the system stability has been improved. The blank sample background is currently ca. 0.006 MC and a precision within 1% can be reached for modern samples. Geological, archaeological, environmental and biomedical samples can be measured routinely. We present some typical applications.

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COPYRIGHT: © the Department of Geosciences, The University of Arizona 

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