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EXPERIMENTAL CONDITIONS FOR 14C GRAPHITE PREPARATION AT THE GXNU LAB, CHINA

Published online by Cambridge University Press:  20 September 2024

Hongtao Shen Open the ORCID record for Hongtao Shen [Opens in a new window] ,
Dingxiong Chen ,
Li Wang ,
Zhaomei Li ,
Junsen Tang ,
Guofeng Zhang ,
Linjie Qi ,
Kaiyong Wu ,
Xinyi Han  and
He Ouyang
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Hongtao Shen*
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China Guangxi Key Laboratory of Nuclear Physics and Technology, Guilin Guangxi 541004, China
Dingxiong Chen
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China
Li Wang
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China
Zhaomei Li
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China
Junsen Tang
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China Guangxi Key Laboratory of Nuclear Physics and Technology, Guilin Guangxi 541004, China
Guofeng Zhang
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China
Linjie Qi
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China
Kaiyong Wu
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China
Xinyi Han
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China
He Ouyang
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China
Yun He
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China Guangxi Key Laboratory of Nuclear Physics and Technology, Guilin Guangxi 541004, China
Ning Wang
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China Guangxi Key Laboratory of Nuclear Physics and Technology, Guilin Guangxi 541004, China
Xiaojun Sun
Affiliation:
College of Physics and Technology, Guangxi Normal University, Guilin Guangxi 541004, China Guangxi Key Laboratory of Nuclear Physics and Technology, Guilin Guangxi 541004, China
Ming He
Affiliation:
China Institute of Atomic Energy, Beijing 102413, China
Kimikazu Sasa
Affiliation:
University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
Shan Jiang
Affiliation:
China Institute of Atomic Energy, Beijing 102413, China
*
*Corresponding author. Email: shenht@gxnu.edu.cn
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Abstract

As a required sample preparation method for 14C graphite, the Zn-Fe reduction method has been widely used in various laboratories. However, there is still insufficient research to improve the efficiency of graphite synthesis, reduce modern carbon contamination, and test other condition methodologies at Guangxi Normal University (GXNU). In this work, the experimental parameters, such as the reduction temperature, reaction time, reagent dose, Fe powder pretreatment, and other factors, in the Zn-Fe flame sealing reduction method for 14C graphite samples were explored and determined. The background induced by the sample preparation process was (2.06 ± 0.55) × 10–15, while the 12C– beam current were better than 40μA. The results provide essential instructions for preparing 14C graphite of ∼1 mg at the GXNU lab and technical support for the development of 14C dating and tracing, contributing to biology and environmental science.

Keywords

AMS14Cgraphitization conditionsZn-Fe reduction
Type
Conference Paper
Information
Radiocarbon , Volume 66 , Issue 5: 24th Radiocarbon and 10th 14C & Archaeology, Zurich, Sept. 11–16, 2022 Proceedings Part 1 of 2 , October 2024 , pp. 1322 - 1334
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of University of Arizona

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Footnotes

Selected Papers from the 24th Radiocarbon and 10th Radiocarbon & Archaeology International Conferences, Zurich, Switzerland, 11–16 Sept. 2022

References

Barile, F, Barone, S, Fedi, ME, et al. 2019. The new sample preparation line for radiocarbon measurements at the INFN Bari Laboratory. Nuclear Instruments and Methods in Physics Research A: Accelerators, Spectrometers, Detectors and Associated Equipment 936:75–77.CrossRefGoogle Scholar
Bennett, CL, Beukens, RP, Clover, MR, et al. 1977. Radiocarbon dating using electrostatic accelerators: negative ions provide the key. Science 198(4316): 508–510.CrossRefGoogle ScholarPubMed
Bronic, IK, Horvatincic, N, Sironic, A, et al. 2010. A new graphite preparation line for AMS 14C dating in the Zagreb Radiocarbon Laboratory. Nuclear Instruments and Methods in Physics Research B: Beam Interactions with Materials and Atoms 268(7–8):943–946.CrossRefGoogle Scholar
Cheng, P, Burr, GS, Zhou, W, et al. 2020. The deficiency of organic matter 14C dating in Chinese Loess-paleosol sample. Quaternary Geochronology 56:101051.CrossRefGoogle Scholar
Dee, M, Ramsey, CB. 2000. Refinement of graphite target production at ORAU. Nuclear Instruments and Methods in Physics Research B: Beam Interactions with Materials and Atoms 172(1):449–453.CrossRefGoogle Scholar
Hua, Q, Jacobsen, GE, Zoppi, U, et al. 2016. Progress in radiocarbon target preparation at the Antares AMS Centre. Radiocarbon 43 (2A):275–282.CrossRefGoogle Scholar
Jull, AJT, Donahue, DJ, Hatheway, AL, et al. 1986. Production of graphite targets by deposition from CO/H2 for precision accelerator 14C measurements. Radiocarbon 28 (2A):191–197.CrossRefGoogle Scholar
Khosh, MS, Xu, X, Trumbore, SE. 2010. Small-mass graphite preparation by sealed tube zinc reduction method for AMS 14C measurements. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 268(7–8):927–930.CrossRefGoogle Scholar
Kitagawa, H, Masuzawa, T, Makamura, T, et al. 1993. A batch preparation method for graphite targets with low background for AMS 14C Measurements. Radiocarbon 35(2):295–300.CrossRefGoogle Scholar
Lubritto, C, Rogalla, D, Rubino, M, et al. 2004. Accelerator mass spectrometry at the 4 MV Dynamitron Tandem in Bochum. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 222(1–2):255–260.CrossRefGoogle Scholar
Macario, KD, Alves, EQ, Oliveira, FM, et al. 2016. Graphitization reaction via zinc reduction: How low can you go?. International Journal of Mass Spectrometry 410:47–51.CrossRefGoogle Scholar
Marzaioli, F, Lubritto, C, Battipaglia, G, et al. 2005. Reconstruction of past CO2 concentration at a natural CO2 vent site using radiocarbon dating of tree rings. Radiocarbon 47(2):257–263.CrossRefGoogle Scholar
Meng, F, Zhang, P, Chen, Y, et al. 2002. Progress of 14C graphite target system in accelerator and graphite target production. Journal of Lanzhou University (Natural Sciences) 38(1):135–136.Google Scholar
Nelson, DE, Korteling, RG, Stott, WR. 1977. Carbon-14: direct detection at natural concentrations. Science 198(4316):507–508.CrossRefGoogle ScholarPubMed
Nielsen, ES. 1952. The use of radio-active carbon (C14) for measuring organic production in the sea. ICES Journal of Marine Science 18:117–140.CrossRefGoogle Scholar
Orsovszki, G, Rinyu, L. 2015. Flame-sealed tube graphitization using zinc as the sole reduction agent: precision improvement of EnvironMICADAS 14C measurements on graphite targets. Radiocarbon 57(5):979–990.CrossRefGoogle Scholar
Salehpour, M, Hakansson, K, Possnert, G. 2015. Small sample Accelerator Mass Spectrometry for biomedical applications. Nuclear Instruments and Methods in Physics Research, Section B. Beam Interactions with Materials and Atoms 361:43–47.CrossRefGoogle Scholar
Santos, GM, Southon, JR, Griffin, S, et al. 2007a. Ultra small-mass AMS 14C sample preparation and analyses at KCCAMS/UCI Facility. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atom 259(1):293–302.CrossRefGoogle Scholar
Santos, GM, Mazon, M, Southon, JR, et al. 2007b. Evaluation of iron and cobalt powders as catalysts for 14C–AMS target preparation. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 259(1):308–315.CrossRefGoogle Scholar
Shen, H, Pang, F, Jiang, S, He, M, Dong, K, Dou, L, et al. 2015. Study on 41Ca-AMS for diagnosis and assessment of cancer bone metastasis in rats. Nuclear Instruments and Methods in Physics Research B 361:643–648 CrossRefGoogle Scholar
Shen, H, Sasa, K, Meng, Q, Matsumura, M, Matsunak, T, et al. 2019. Exposure age dating of Chinese tiankengs by 36Cl-AMS. Nuclear Instruments and Methods in Physics Research Section B 459:29–35.CrossRefGoogle Scholar
Shen, H, Shi, S, Tang, J, et al. 2022b. 14C–AMS technology and its applications to an oil field tracer experiment. Radiocarbon 64(5):1159–1169.CrossRefGoogle Scholar
Shen, H, Tang, J, Wang, L, et al. 2022c. New sample preparation line for radiocarbon measurements at the GXNU Laboratory. Radiocarbon 1–11.Google Scholar
Shen, H, Zhang, G, Tang, J, et al. 2022a. A single-stage accelerator mass spectrometer and its applications at Guangxi Normal University. Nuclear Instruments and Methods in Physics Research Section B 532:68–72.CrossRefGoogle Scholar
Slota, PJ, Jull, AJT, Linick, TW, et al. 1987. Preparation of small samples for 14C accelerator targets by catalytic reduction of CO. Radiocarbon 29 (2):303–306.CrossRefGoogle Scholar
Walker, BD, Xu, X. 2019. An improved method for the sealed-tube zinc graphitization of microgram carbon samples and 14C AMS measurement. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 438:58–65.CrossRefGoogle Scholar
Xu, X, Trumbore, SE, Zheng, S, et al. 2007. Modifying a sealed tube zinc reduction method for preparation of AMS graphite targets: reducing background and attaining high precision. Nuclear Instruments and Methods in Physics Research B: Beam Interactions with Materials and Atoms 259(1):320–329.CrossRefGoogle Scholar
Zhou, WJ, Zhang, J. 2001. The sample preparation at AMS 14C dating. Nuclear Techniques 24(S1):236–243.Google Scholar
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