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NEW SAMPLE PREPARATION LINE FOR RADIOCARBON MEASUREMENTS AT THE GXNU LABORATORY

Published online by Cambridge University Press:  30 May 2022

Hongtao Shen*
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin541004, China Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology, Guilin, Guangxi541004, China
Junsen Tang
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin541004, China
Li Wang
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin541004, China
Mingli Qi
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin541004, China
Zhaomei Li
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin541004, China
Siyu Wei
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin541004, China
Kimikazu Sasa
Affiliation:
University of Tsukuba, Tsukuba, Ibaraki305-8577, Japan
Shulin Shi
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin541004, China
Guofeng Zhang
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin541004, China
Dingxiong Chen
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin541004, China
Linjie Qi
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin541004, China
Ning Wang
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin541004, China Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology, Guilin, Guangxi541004, China
Houbing Zhou
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin541004, China Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology, Guilin, Guangxi541004, China
Ming He
Affiliation:
China Institute of Atomic Energy, Beijing102413, China
Qingzhang Zhao
Affiliation:
China Institute of Atomic Energy, Beijing102413, China
Yun He*
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin541004, China Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology, Guilin, Guangxi541004, China
*
*Corresponding authors. Emails: shenht@gxnu.edu.cn; hy@gxnu.edu.cn
*Corresponding authors. Emails: shenht@gxnu.edu.cn; hy@gxnu.edu.cn

Abstract

A new system for preparing 14C samples was established for a compact accelerator mass spectrometer (GXNU-AMS) at Guangxi Normal University. This sample preparation system consists of three units: a vacuum maintenance unit, a CO2 purification unit, and a CO2 reduction unit, all of which were made of quartz glass. A series of radiocarbon (14C) preparation experiments were conducted to verify the reliability of the system. The recovery rate of graphite obtained was more than 80%. The carbon content in the commercial toner and wood sample was linearly fitted to the CO2 pressure in the measurement unit of the system. The results showed a good linear relationship, indicating that the reliability of the sample preparation system. AMS measurements were conducted on a batch of standard, wood, and dead graphite samples prepared using this system. The results showed that the beam current of 12C- for each sample was more than 40 μA, the carbon contamination introduced during the sample preparation process was ∼ 2 × 10–15, and that the new sample preparation system is compact, low-contamination, and efficient and meets the GXNU-AMS requirements for 14C samples.

Type
Conference Paper
Copyright
© The Author(s), 2022. Published by Cambridge University Press for the Arizona Board of Regents on behalf of the University of Arizona

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Footnotes

Selected Papers from the 3rd Radiocarbon in the Environment Conference, Gliwice, Poland, 5–9 July 2021

References

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