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Photodesorption from Interstellar Dust Grains∗

Published online by Cambridge University Press:  14 August 2015

Lawrence T. Greenberg
Lawrence T. Greenberg*
Affiliation:
Dept. of Physics, University of California, Berkeley 94720, Calif., U.S.A.

Abstract

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An experiment to measure the photodesorption of physisorbed gases from a cold fused quartz substrate by near UV photons is described. The observed yield (mol photon–1) is as large as 10–5, a higher yield is likely in the vacuum UV. Included is a discussion of the photodesorption process and some applications to the interstellar medium. The observed yield is enough to maintain molecular abundances in moderate density interstellar clouds in equilibrium.

Type
Part VII Molecules, Theory and Observations
Information
Symposium - International Astronomical Union , Volume 52: Interstellar Dust and Related Topics , 1973 , pp. 413 - 419
Copyright
Copyright © Reidel 1973 

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