The formation of interstellar H2 on transition metal grains

Details The formation of interstellar H2 on transition metal grains The formation of interstellar H2 on transition metal grains

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.113..365y&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 113, no. 2, July 1985, p. 365-371.

Astronomy and Astrophysics

Astrophysics

1

Hydrogen, Interstellar Chemistry, Interstellar Matter, Iron, Nickel, Adsorption, Desorption, Reaction Kinetics

Scientific paper

Semi-empirical SCF-MO method - CNDO/2 is extended to transition element iron. The chemical adsorption energy of atom H and the desorption activation energy of molecule H2 on an iron grain surface are computed using a cluster model. The weak chemical adsorption energy of H and the desorption activation energy of H2 on a nickel grain surface are also calculated by assuming a configuration 3s23p63d10 for the Ni-atom in solid state. In a diffuse cloud, which is near a strong interstellar radiation field, according to the kinetic theory the chemical reactions, the formation rates of H2 on Fe and Ni grain surfaces are estimated. The functions of dielectric grains and Ni, Fe grains on the formation of interstellar H2 are discussed.

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