Prediction of deuterium abundance in comets

Details Prediction of deuterium abundance in comets Prediction of deuterium abundance in comets

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icar...61...57v&link_type=abstract

(Conference on Protostars and Planets II, Tucson, AZ, Jan. 4-7, 1984) Icarus (ISSN 0019-1035), vol. 61, Jan. 1985, p. 57-59.

Physics

7

Abundance, Comets, Cosmochemistry, Deuterium, Isotopic Enrichment, Hydrogen, Ionic Reactions, Volatility, Comets, Deuterium, Abundance, Enrichment, Volatiles, Accretion, Dust, Condensation, Particles, Parent Bodies, Element Ratios, Chemistry

Scientific paper

Using a chemical scheme based on ion-molecule reactions in cool interstellar clouds, the possibility of a deuterium enrichment of volatile material in comets is discussed. It is assumed that the hydrogen-containing molecules are deuterated before accretion and condensation on the core-mantle dust particles from which the cometesimals are formed. The D/H ratio in comets may be enhanced in respect to the average value by a factor of 102. Therefore comets are not promising objects for testing the primordial deuterium abundance.

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