Hydrogen-atom photofragment spectroscopy. Photodissociation dynamics of H2O in the BX absorption band

HJ KRAUTWALD*, L SCHNIEDER, KH WELGE, Michael N R Ashfold

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

The photofragmentation dynamics of H2O molecules following vacuum ultraviolet laser excitation at wavelengths within the B1A1X1A1 absorption band have been investigated using a novel from of photofragment translational spectroscopy. Analysis of the nascent H atom time-of-flight spectra confirms the importance of the dissociation channel leading to ground-state H + OH products. In addition, it reveals that the OH(X) fragments are formed predominantly in their zero-point vibrational level with a highly excited, inverted rotational-state population distribution. A consideration of the topology of the various potential-energy surfaces sampled by the H2O molecules during this electronically non-adiabatic dissociation process suggests a likely explanation for this observed pattern of energy disposal.
Original languageEnglish
Pages (from-to)99-110
Number of pages12
JournalFaraday Discussions of the Chemical Society
Volume82
DOIs
Publication statusPublished - 1986

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