三种模型级联的比较  

Comparison of Three Model Cascades

作　　者：张宇楠[1] 曾实[1] 

机构地区：[1]清华大学工程物理系,北京100084

出　　处：《原子能科学技术》2014年第11期1921-1927,共7页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(11075088)

摘　　要：模型级联在多组分同位素分离的级联理论研究中有着重要的地位。本文介绍了级联研究中三种常用的模型级联,即Q级联、准理想级联和相对丰度匹配级联,包括模型的背景和意义、基本性质、实际应用等。通过对比三种模型中一些关键参数的解析表达式以及分离特性,说明了三者具有很大的相似性和内在联系。对比结果表明,相对丰度匹配级联是准理想级联的一种特例,而Q级联虽是一连续流量级联,但类似于准理想级联,其各组分分流比近似为常数,且二者的分离特性均以相似的规律取决于一虚拟组分分子量M*,二者也可视为同一类级联形式。The model cascade plays a very important role in the study of cascades separa‐ting multicomponent isotope components .Three widely used model cascades ,including the Q‐cascade ,the quasi‐ideal cascade and the matched abundance ratio cascade ,were investigated . T heir backgrounds and significances , basic properties and applications were introductorily explained . Through comparing the analytical expressions of some key parameters and separation properties ,it is show n that the three model cascades have significant similarities and intrinsic relationships . Matched abundance ratio cascade proves to be a special case of the quasi‐ideal cascade .As a type of cascades of continuous profile ,the Q‐cascade has approximately constant partial cuts for each component ,just like the case in the quasi‐ideal cascade .Moreover ,the same key parameter called molar mass of a virtual component M＊ determines the separation properties of both Q‐cascade and quasi‐ideal cascade ,in a similar rule .Therefore ,they can be treated as the same class of cascades .

关 键 词：同位素分离 模型级联 相似性 

分 类 号：TL252[核科学技术—核燃料循环与材料]