Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 105, Issue 11, Pages 2173-2182Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp003839+
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The associative desorption of H-2 (v,j) on a graphite (0001) surface via an Eley-Rideal mechanism has been studied theoretically. In our calculations we used a time-dependent wave packet method treating three degrees of freedom quantum mechanically. A newly developed potential energy surface based on plane-wave density functional calculations was employed. In our 3D calculations we find less vibrational excitation for the product H-2 molecules than in calculations that used only two degrees of freedom. However, the product H-2 molecules are formed rotationally excited. This could have important implications for the chemistry of H-2 in the interstellar medium and the interpretation of astronomical data.
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