Modeling of Carbon Migration in Meteorite Olivines Influenced by Ionizing Radiation

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 f...

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Bibliographic Details
Published in:Solar system research 2003-03, Vol.37 (2), p.128-133
Main Authors: Shilobreeva, S N, Kuz'min, L E
Format: Article
Language:English
Subjects:
Carbon
Crystals
Geology
Ionizing radiation
Ions
Low temperature
Meteors & meteorites
Radiation
Radioisotopes
Studies
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Summary: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 α 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 × 10^sup -4^ wt %) in crystals of meteorite olivines, which is related to the concentration of vacancies from the α radiation of natural radionuclides, was estimated for the first time.[PUBLICATION ABSTRACT]
ISSN:0038-0946
1608-3423
DOI:10.1023/A:1023336509279