Measuring the Shock Stage of Asteroid Regolith Grains by Electron Back-Scattered Diffraction

[摘要] We have been analyzing Itokawa samples in order to definitively establish the degree of shock experienced by the regolith of asteroid Itokawa, and to devise a bridge between shock determinations by standard light optical petrography, crystal structures as determined by electron and X-ray diffraction. These techniques would then be available for samples returned from other asteroid regoliths.

[发布日期] 2018-03-19

[学科分类] 空间科学

[关键词] ASTEROIDS;BACKSCATTERING;CHONDRITES;CRYSTAL STRUCTURE;ELECTRON DIFFRACTION;METEORITIC COMPOSITION;PETROGRAPHY;REGOLITH;SAMPLES;COMETS;OLIVINE;REFLECTION;SIZE DISTRIBUTION;STRAIN MEASUREMENT;SYNCHROTRONS;X RAY DIFFRACTION