同位素2026，Vol.39Issue(3)：239-246,8.DOI:10.7538/tws.2025.youxian.002
239Pu同位素的小型化AMS高效高灵敏测量方法研究
High-Efficiency and High-Sensitivity Measurement Method of 239Pu Isotopes with Miniaturized AMS
摘要
Abstract
As an ultra-trace heavy nuclides,Pu have important applications in fields such as nuclear environmental protection,nuclear astrophysics,and geological research.Accelerator mass spectrometry(AMS),with its low detection limits,high measurement sensitivity,and effective capability to overcome interferences from isobars and molecular ions,is the most suitable method for measuring Pu isotopes such as 239Pu and 242Pu.This work,based on the 300 kV AMS system at the China Institute of Atomic Energy(CIAE),conducted research on Pu measurement methods.The study primarily included investigations into negative ion extraction from the ion source,high-efficiency system transmission,background exclusion,and particle identification techniques.Ultimately,a high-efficiency transmission and high-sensitivity measurement method for Pu was established.Measurement results of standard samples were consistent with their nominal values and demonstrated excellent stability,with a detection limit of 2×106 atoms(0.8 fg)for 239Pu.关键词
AMS/小型化/Pu/高效率/高灵敏Key words
AMS/miniaturization/Pu/high efficiency/high sensitivity分类
能源科技引用本文复制引用
龚杰,何明,王龙,赵庆章,张文慧,胡畔,姚振宇..239Pu同位素的小型化AMS高效高灵敏测量方法研究[J].同位素,2026,39(3):239-246,8.基金项目
国家财政部稳定支持研究项目(WDJC-2019-04) （WDJC-2019-04）
国家自然科学基金项目(11875326) （11875326）
国防基础项目 （）
