Computer Science
Scientific paper
May 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982m%26p....26..279n&link_type=abstract
Moon and the Planets, vol. 26, May 1982, p. 279-304.
Computer Science
Impact Melts, Lunar Surface, Micrometeoroids, Volatility, Drops (Liquids), Environment Simulation, Glass, Meteoritic Damage, Outgassing, Pulsed Lasers
Scientific paper
Modulated laser pulses incident on rocks and minerals in a vacuum are used to create microcraters, in a laboratory simulation of volatilization from the melts caused by micrometeoroid impacts on the lunar surface. Condensates were formed, and gases solved in the bulk of the rock and mineral grains were released. Volatilization is found to be negligible only in the crater glass layers, confirming the predictions of Nusinov and Chernyak (1975, 1976). For micron-sized drops, the volatilization of Na, K, etc. can be as high as 10-20%. In larger-sized drops, volatilization should lead to the appearance of an element concentration gradient over the particle cross-section, leading to surface enrichment by Si as a result of gradient normalization. Preliminary conclusions are drawn concerning a possible correlation between dust particle compositions and sizes in the solar system and in the universe.
Feldman V. I.
Nusinov M. D.
Vysochkin V. V.
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