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Molecule Formation on Grain Surfaces*

Published online by Cambridge University Press:  30 March 2016

E. E. Salpeter
E. E. Salpeter*
Affiliation:
Cornell University, Ithaca, N.Y., U.S.A.

Extract

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I will discuss the formation of molecules AB from two atoms or radicals A and B only for cases where the reaction A + B → AB is exothermic. The efficiency of this reaction on the surface of an interstellar dust grain is the product of two factors: (i) the ‘sticking coefficient’ or probability that the first radical hitting the grain surface from the interstellar gas becomes thermalized and sticks to an adsorption site; (ii) the recombination efficiency or probability that the first adsorbed radical will remain adsorbed, rather than evaporating, during the time required for the second radical to hit the grain, be adsorbed and find its partner.

Type
III. Joint Discussions
Information
Highlights of Astronomy , Volume 2: Highlights of Astronomy. As presented at the XIVth General Assembly of the IAU, 1970 , 1971 , pp. 429 - 431
Copyright
Copyright © Reidel 1971

Footnotes

*

Supported in part by the U.S. National Science Foundation.

References

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