Volume 168, 2014

Free-electron laser induced processes in thin molecular ice

Abstract

Intermolecular reactions in and on icy films on silicate and carbonaceous grains constitute a major route for the formation of new molecular constituents in interstellar molecular clouds. In more diffuse regions and in protoplanetary discs, energetic radiation can trigger reaction routes far from thermal equilibrium. As an analog of interstellar ice-covered dust grains, highly-oriented pyrolytic graphite (HOPG) covered with D2O, NO, and H atoms is irradiated by ultrashort XUV pulses and the desorbing ionic and neutral products are analysed. The yields of several products show a nonlinear intensity dependence and thus enable the elucidation of reaction dynamics by two-pulse correlated desorption.

Article information

Article type
Paper
Submitted
02 Dec 2013
Accepted
17 Dec 2013
First published
17 Dec 2013

Faraday Discuss., 2014,168, 553-569

Author version available

Free-electron laser induced processes in thin molecular ice

B. Siemer, S. Roling, R. Frigge, T. Hoger, R. Mitzner and H. Zacharias, Faraday Discuss., 2014, 168, 553 DOI: 10.1039/C3FD00116D

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