JOURNAL OF ISOTOPES ›› 0, Vol. ›› Issue (): 0-0.DOI: 10.7538/tws.2016.youxian.049

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Centrifugal Separation of Carbon and Chlorine Isotopes Using Freon-11 as Processing Gas

PEI Gen;ZHOU Ming-sheng;JIANG Dong-jun   

  1. Department of Engineering Physics, Tsinghua University, Beijing 100084, China
  • Published:2017-01-09

以氟利昂-11为介质离心分离碳和氯同位素

裴根;周明胜;姜东君   

  1. 清华大学 工程物理系,北京100084

Abstract:

In order to explore the effective ways for high-abundance carbon and chlorine isotopes production, a method to acquire high-abundance carbon-12 and chlorine-35 isotopes simultaneously was presented by gas centrifugation process using Freon-11 as processing gas. Carbon and chlorine isotopes were separated by single centrifugal experiment of domestic centrifuge. A proper mass spectrometric method was proposed to analyze the separation performance. Theoretical calculation on cascades for producing high-abundance carbon-12 and chlorine-35 isotopes was applied. The results showed that using a 24-stage square cascade, with the 3rd stage as feeding stage and reflux at both ends, carbon-12 and chlorine-35 isotopes of an abundance of above 99% could be acquired simultaneously. The experimental study and theoretical calculation provided evidence for the production of high-abundance carbon-12 and chlorine-35 isotopes. In theory, the method could also be applied to the production of high-abundance carbon-13 and chlorine-37 isotopes.

Key words: gas centrifugation process, Freon-11, carbon isotopes, chlorine isotopes

摘要:

为同时获得高丰度的碳-12和氯-35同位素,以氟利昂-11(CCl3F)作为分离介质,采用气体离心法分离同位素。使用国产离心机开展碳和氯同位素的单机分离,采用质谱法分析分离性能。通过对生产高丰度碳-12和氯-35同位素的级联理论计算表明,使用总级数为24级、供料级为第3级的取料端有回流的矩形级联可以同时获得丰度大于99%的碳-12和氯-35同位素。实验结果和级联计算为高丰度碳-12和氯-35同位素的制备提供依据,该方法理论上也可用于高丰度碳-13和氯-37同位素的制备。

关键词: 气体离心法, 氟利昂-11, 碳同位素, 氯同位素