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Molecule Formation on Grain Surfaces*
Published online by Cambridge University Press: 30 March 2016
Extract
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
- Copyright
- Copyright © Reidel 1971
Footnotes
Supported in part by the U.S. National Science Foundation.