INFRARED EXTINCTION OF HEAVY-ION IRRADIATED AND AMORPHOUS OLIVINE, WITH APPLICATIONS TO INTER-STELLAR DUST

被引：86

作者：

KRATSCHMER, W ^{[1
]}

HUFFMAN, DR ^{[1
]}

机构：

[1] UNIV ARIZONA,DEPT PHYS,TUCSON,AZ 85721

来源：

ASTROPHYSICS AND SPACE SCIENCE | 1979年 / 61卷 / 01期

关键词：

D O I：

10.1007/BF00645803

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A smooth surface layer of highly disordered olivine, (Mg, Fe)2SiO4, has been produced by exposure of polished, natural olivine to a dose of 5×1016 cm-2 of 1.5 MeV neon ions from a Van de Graaff accelerator. The dielectric functions of the disordered silicate in the wavelength range from 8 to 30 μm have been determined from analysis of specular reflectance data, and extinction for Rayleigh particles of such disordered olivine has been calculated. Extinction measurements for amorphous olivine smoke collected on a substrate are also presented. The small particle extinctions of both kinds of structurally disordered olivine are shown to agree well with the main features of the absorption and emission spectra from interstellar grains in the 10 and 20 μm region. © 1979 D. Reidel Publishing Co.

引用

页码：195 / 203

页数：9

共 18 条

[1]

BRUNEL R, 1974, B SOC FRANC MINER CR, V93, P328

[2] MEASURED EXTINCTION OF SMALL OLIVINE SPHERES [J].