A single stage AMS system and its applications at Guangxi Normal University

Prof. Hongtao Shen1,2,3, Shulin Shi1, Junsen Tang1, Li Wang1, Guofeng Zhang1, Mingji Liu1, Professor Kimikazu Sasa2, Professor Ming He4, Yiwen Bao4, Professor Jiang Shan1

1Guangxi Normal University, Guilin, China, 2University of Tsukuba, Tsukuba, Japan, 3Guangxi key laboratory of nuclear physics and technology, Guilin, China, 4China institute of Atomic Energy, Beijing, China

 GXNU-AMS, a compact 14C accelerator mass spectrometer, jointly developed by the Chinese Institute of Atomic Energy and Guangxi Normal University was installed and commissioned in Guangxi Normal University. Without the traditional mode of SF6 pressure tank, The terminal of the system was designed as an open insulated high voltage platform, which reduces the construction size of the traditional accelerator to be about 2.5×4.5 square meters. Helium gas stripping was used to eliminate the interference of molecular ions, and the maximum operating voltage was 230KV. At present, the measurement accuracy of the instrument is 0.5%, and the measurement sensitivity is 14C/12C≈5×10-15 (measurement background is 45,000 years), which can meet the measurement requirements in the fields of life sciences and archaeology. In this paper, the experimental conditions and the lowest possible energy of GXNU-AMS were discussed, as well as several interesting application studies in GXNU-AMS group were presented.

Keywords: status; GXNU-AMS; 14C; low energy


Hongtao Shen is a professor of Nuclear Physics and Technology at Guangxi Normal University, China, a member of the International Radiocarbon Scientific Committee, and a Member of the East Asia International Accelerator Mass Spectrometry (EA-AMS) Academic Committee. Previously he was a researcher at the University of Tsukuba, Japan. His research lies in the accelerator mass spectrometry and its application research work. He has published >30 peer-reviewed papers in leading journals such as Physical Review C, Scientific Reports, NIMB, Radiocarbon. He is now in charge of the construction of Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology in Guangxi, China.

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Nov 16 2021


8:45 am - 9:45 am