分离级联中出现峰值组分的质量与平均质量的关系

Relationship between peaking mass of isotope and average mass of isotopes in a separation cascade

为了获得所需丰度的同位素，需要将多个分离单元联结成级联。因而必须对多元同位素混合物在级联中的分离情况进行深入研究。假定分离系数小，从多组分级联输运方程出发，利用全分离系数与不同组分质量差的关系，导出了在级联中某组分丰度出现峰值处该组分质量与平均质量的关系。并对级联中分离单元的分离情况进行了分析。得出以下结论：在级联分离多组分同位素混合物的过程中，当某一组分的丰度在级联中出现峰值，其质量等于此处平均质量（略有偏移），以上结论是在小分离系数的条件下得到的。

For catching the isotope of the needed concentration, it is necessary to understand the separation mechanism of the multicomponent isotopic mixture inside the cascade. In case of small separation factors per stage, the relationship between mass of i th isotope and the average mass of isotopes at the place where i th isotope reaches its maxium concentration inside a separation cascade has been obtained. The separation unit of the cascade has also been analysed. The conclusion is that in the process of multicomponent isotopic mixture separation in a cascade, when the concentration reaches maximum, its mass is equal to the average mass(slightly deviating). Although the result is obtained under the condition of small separation factors, it is useful for reference in case of large separation factors.