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14C/12C isotopic ratio of a research nuclear reactor graphite control bar
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms ( IF 1.4 ) Pub Date : 2020-10-22 , DOI: 10.1016/j.nimb.2020.09.015
D. Belmont , D.J. Marín-Lámbarri , H.S. Cruz-Galindo , A. Huerta , M.A. Martínez , J. Mas-Ruiz , M.E. Ortiz , R. Raya-Arredondo , G. Reza , M. Rodríguez-Ceja , S. Sandoval-Hipólito , C. Solís , A.O. Valdez-Guerrero , A.B. Zunun-Torres , E. Chávez

In this work we determine the 14C content in a graphite bar used in the core of the research nuclear reactor TRIGA MARK III, at the “Instituto Nacional de Investigaciones Nucleares” (ININ) in México. The 14C/12C ratio was measured, using Accelerator Mass Spectrometry (AMS) at the Laboratorio Nacional de Espectrometría de Masas con Aceleradores (LEMA) at the ”Instituto de Física de la Universidad Nacional Autónoma de México” (IFUNAM). Our results show a 14C ratio over three orders of magnitude higher than that found in modern organic matter. A γ-ray spectroscopy study of the graphite bar with a High Purity Germanium detector (HPGe) shows the presence of the same radioactive isotopes reported in previous studies of similar bars.



中文翻译:

14C/12C 核反应堆石墨控制棒的同位素比

在这项工作中,我们确定 14C墨西哥“国家核研究机构”(ININ)的研究用核反应堆TRIGA MARK III核心所用的石墨棒中的含量。的14C/12C比率是使用“墨西哥国立大学自动化研究所”(IFUNAM)的国家实验室(MEMA)在加速器质谱仪(AMS)上进行的。我们的结果显示14C比现代有机物质高三个数量级的比率。一种γ高纯度锗检测器(HPGe)对石墨棒进行的X射线光谱研究表明,在先前对类似棒的研究中报道了相同的放射性同位素。

更新日期:2020-10-29
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