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Improvements and Applications of AMS Radiocarbon Measurement at Peking University

Published online by Cambridge University Press:  18 July 2016

Zhiyu Guo
Affiliation:
Institute of Heavy Ion Physics, Peking University, Beijing 100871 China
Kexin Liu
Affiliation:
Institute of Heavy Ion Physics, Peking University, Beijing 100871 China
Kun Li
Affiliation:
Institute of Heavy Ion Physics, Peking University, Beijing 100871 China
Jianjun Wang
Affiliation:
Institute of Heavy Ion Physics, Peking University, Beijing 100871 China
Bin Li
Affiliation:
Institute of Heavy Ion Physics, Peking University, Beijing 100871 China
Xiangyang Lu
Affiliation:
Institute of Heavy Ion Physics, Peking University, Beijing 100871 China
Chia-Erh Chen
Affiliation:
Institute of Heavy Ion Physics, Peking University, Beijing 100871 China
Tiemei Chen
Affiliation:
Institute of Heavy Ion Physics, Peking University, Beijing 100871 China
Sixun Yuan
Affiliation:
Institute of Heavy Ion Physics, Peking University, Beijing 100871 China
Shijun Gao
Affiliation:
Institute of Heavy Ion Physics, Peking University, Beijing 100871 China
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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.

Type
V. Advances in Measurement Techniques
Copyright
Copyright © the Department of Geosciences, The University of Arizona 

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