Laboratory studies on structural modifications induced by ions irradiation on crystalline silicates

Details Laboratory studies on structural modifications induced by ions irradiation on crystalline silicates Laboratory studies on structural modifications induced by ions irradiation on crystalline silicates

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....3577b&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #3577

Physics

Scientific paper

Recently, both in circumstellar environments of young and evolved stars and in cometary comae, it has been shown by ISO satellite the presence of crystalline silicate dusts. A wide debate was born on the origin of crystalline dusts in comets. Cometary grains, in fact, should reflect the less modified nature of interstellar grains which have been observed to be amorphous. Effects of ions irradiation processing on silicates were studied in laboratory and here summarised, with particular emphasis on structural changing suffered by silicates during their permanence in the interstellar medium. In particular ion doses and time scales for amorphysation of crystalline forsterite by low energy ions irradiation are presented.

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