用热表面离子源测定了锂同位素丰度，在样品全耗尽过程中累计离子流强度。
The isotopic ratio of lithium was determined by cumulating intensity of ion current during evaporation of all samples on evaporation filament.
通过对不同形式的离心级联进行丰度计算，得到任意两种组分间的全分离因子与它们的相对分子质量之差成指数关系。
Analysis of the filtered experimental data gave an exponential relationship between the overall separation factor of the cascade and the relative molecular mass differences.
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