放射性氙同位素取样装置的建立及其效率标定

Study on the Sampler for Radioxenon Isotopes and its Sampling Efficiency Calibration

摘要: 为了在常温至低温条件下进行大气中氙同位素取样,研制了一套稀有气体取样实验装置(ExperimentalSamplerforRareGases,RSRG),并以129Xe为分析对象,利用感应耦合等离子体质谱仪进行了取样效率标定。实验结果表明,在采用再生吸附剂条件下,ESRG装置对大气本底水平浓度氙同位素的取样效率可达40%。

Abstract: An experimental sampler for rare gases (ESRG) which can collect radioxenon isotopes from atmosphere under normal temperature and low temperature is installed and studied. Its sampling efficiency is calibrated with ICP-MS (Inductively Coupled Plasma-Mass Spectrum) through analyzing the ~129Xe in the off-gas of ESRG. The main experimental results show that the sampling efficiency to xenon isotopes in ambient air is up to 40% when the adsorbent is effectually regenerated.