Evaluation of 14C/12C ratio measurements using accelerator mass spectrometry with standard materials under different graphitization conditions

IF 1.6 3区工程技术 Q3 CHEMISTRY, INORGANIC & NUCLEAR Applied Radiation and Isotopes Pub Date : 2024-11-17 DOI:10.1016/j.apradiso.2024.111589

Sae-Hoon Park, Seung-Won Lee, Yu-Seok Kim

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Abstract

In this study, an evaluation of carbon-beam tuning and ¹⁴C/¹²C ratio measurements is performed to validate the graphitization process in the pre-processing procedure employed at the accelerator mass spectrometry (AMS) facility of Dongguk University in Korea. The AMS isotopic ratio data are analyzed for samples subjected to three different graphitization conditions: (1) the entire process including Fe catalyst pre-heating with a high vacuum, (2) a high vacuum without pre-heating, and (3) a low vacuum without pre-heating. High-quality isotopic ratio measurements are achieved under these conditions. The measured mean isotopic ratio values for the background samples are almost equivalent to the different graphitization condition samples, with a difference in the order of 10⁻¹⁶. Therefore, conducting measurements with or without Fe catalyst pre-heating or high vacuum conditions is equally viable. Furthermore, the simplification of the graphitization process steps reduces the processing time required to produce five samples from 8 to 4 h, thereby enhancing the daily sample throughput by a factor of two, without compromising data quality.

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在不同石墨化条件下使用加速器质谱对标准材料进行 14C/12C 比值测量的评估

本研究对碳束调谐和 14C/12C 比率测量进行了评估，以验证韩国东国大学加速器质谱（AMS）设施所采用的预处理程序中的石墨化过程。对三种不同石墨化条件下的样品进行了 AMS 同位素比数据分析：(1) 包括铁催化剂高真空预热在内的整个过程；(2) 无预热的高真空；(3) 无预热的低真空。在这些条件下都能进行高质量的同位素比测量。所测量的背景样品平均同位素比值与不同石墨化条件下的样品几乎相当，相差在 10-16 数量级。因此，在有无铁催化剂预热或高真空条件下进行测量同样可行。此外，石墨化过程步骤的简化将生产 5 个样品所需的处理时间从 8 小时减少到 4 小时，从而在不影响数据质量的情况下将每日样品吞吐量提高了 2 倍。

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来源期刊

Applied Radiation and Isotopes 工程技术-核科学技术

CiteScore

3.00

自引率

12.50%

发文量

406

审稿时长

13.5 months

期刊介绍： Applied Radiation and Isotopes provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and peaceful application of nuclear, radiation and radionuclide techniques in chemistry, physics, biochemistry, biology, medicine, security, engineering and in the earth, planetary and environmental sciences, all including dosimetry. Nuclear techniques are defined in the broadest sense and both experimental and theoretical papers are welcome. They include the development and use of α- and β-particles, X-rays and γ-rays, neutrons and other nuclear particles and radiations from all sources, including radionuclides, synchrotron sources, cyclotrons and reactors and from the natural environment. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. Papers dealing with radiation processing, i.e., where radiation is used to bring about a biological, chemical or physical change in a material, should be directed to our sister journal Radiation Physics and Chemistry.