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准确测定核设施环境擦拭样品中含铀微粒同位素比在核保障中有重要的应用价值。目前其测定的方法主要有SIMS和FT-TIMS,其中擦拭样品中常量元素形成的多原子离子会影响SIMS准确测定~(236)U/~(238)U,TIMS测量中铀较低的离子化效率、多原子离子等干扰也影响含铀微粒~(236)U/~(238)U同位素比的准确测定。加速器质谱作为一种
Accurate determination of uranium-bearing particulate isotope ratios in nuclear wipe samples has important applications in nuclear safeguards. At present, SIMS and FT-TIMS are the main methods of determination. Polyatomic ions formed by constant elements in wiping samples will affect SIMS accurate determination of ~ (236) U / ~ (238) U and lower uranium ionization in TIMS measurement Interferences such as efficiency and polyatomic ions also affect the accurate determination of ~ (236) U / ~ (238) U isotope ratios of uranium-bearing particulates. Accelerator mass spectrometry as one