Segregation of isotopes of heavy metals due to light-induced drift:: results and problems

被引：0

作者：

Sapar, A. ^{[1
]}

Aret, A. ^{[1
]}

Poolamaee, R. ^{[1
]}

Sapar, L. ^{[1
]}

机构：

[1] Tartu Astrophys Observ, EE-61602 Toravere, Estonia

来源：

CONTRIBUTIONS OF THE ASTRONOMICAL OBSERVATORY SKALNATE PLESO | 2008年 / 38卷 / 02期

关键词：

processes : diffusion; stars : atmospheres; stars : chemically peculiar;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Atutov and Shalagin (1988) proposed light-induced drift (LID) as a physically well understandable mechanism to explain the formation of isotopic anomalies observed in CP stars. We have generalized the theory of LID and applied it to diffusion of heavy elements and their isotopes in quiescent atmospheres of CP stars. Diffusional segregation of isotopes of chemical elements is described by the equations of continuity and diffusion velocity. Computations of evolutionary sequences for the abundances of mercury isotopes in several model atmospheres have been made, using the Fortran 90 program SMART composed by the authors. Results confirm predominant role of LID in separation of isotopes.

引用

页码：273 / 278

页数：6

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