Modeling of carbon migration in meteorite olivines influenced by ionizing radiation

被引：1

作者：

Shilobreeva, SN

Kuz'min, LE

机构：

[1] Russian Acad Sci, Vernadsky Inst Geochem & Analyt Chem, Moscow 119991, Russia

[2] Russian Acad Sci, Inst Nucl Res, Moscow, Russia

来源：

SOLAR SYSTEM RESEARCH | 2003年 / 37卷 / 02期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1023/A:1023336509279

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The thermal diffusion of carbon in model crystals of forsterite was studied experimentally and compared with radiation-enhanced diffusion in olivines. A hypothesis is proposed concerning the radiation nature of carbon migration in natural crystals of meteorite olivines at low temperatures. For the first time, the effect of the a radiation of natural radionuclides on carbon migration was examined in detail by means of numerical modeling. A vacancy mechanism was assumed for the radiation-enhanced diffusion of carbon. The maximum carbon content (6 x 10(-4) wt %) in crystals of meteorite olivines, which is related to the concentration of vacancies from the a radiation of natural radionuclides, was estimated for the first time.

引用

页码：128 / 133

页数：6

共 23 条

[1] Processing of silicate dust grains in Herbig Ae/Be systems [J].