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

Zolensky, Michael ; Martinez, James ; Sitzman, Scott ; Mikouchi, Takashi ; Hagiya, Kenji ; Ohsumi, Kazumasa ; Terada, Yasuko ; Yagi, Naoto ; Komatsu, Mutsumi ; Ozawa, Hikaru(Hyogo Univ, Hyogo, Japan)

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;   

RP-ID  :  JSC-E-DAA-TN51920

学科分类：空间科学

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来源: NASA Technical Reports Server

【 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.