Journal article
Isotope effects in the photofragmentation of symmetric molecules: The branching ratio of OD/OH in water
With HOD initially in its vibrational ground state, we present a new detailed interpretation of the OD/OH branching ratio (similar to 3) in the photoinduced process D+OH H+OD, in the first absorption band. Using semiclassical arguments, we show that the branching ratio has little to do with the initial distribution of configurations, but the initial momentum distribution plays a key role in determination of the branching ratio.
The formation of D+OH arises from initial situations where OD is stretching, and it stretches faster than OH, whereas all other motions lead to H+OD. This picture is confirmed by quantum wave-packet calculations. (c) 2005 American Institute of Physics.
Language: | English |
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Publisher: | American Institute of Physics |
Year: | 2005 |
Pages: | 204320 |
ISSN: | 10897690 and 00219606 |
Types: | Journal article |
DOI: | 10.1063/1.1924409 |
ORCIDs: | Henriksen, Niels Engholm and Møller, Klaus Braagaard |