Rotational state specific dissociation dynamics of D2O via the C electronic state

The Journal of Chemical Physics
Yuan ChengXueming Yang

Abstract

The rotational state resolved photodissociation dynamics of D(2)O via the C state has been investigated using the D-atom Rydberg "tagging" time-of-flight technique, with a tunable vacuum ultraviolet photolysis light source. The photodissociation action spectrum of the D(2)O C<--X (3p(z)<--1b(1)) band has been recorded. The linewidths of rotational transitions have been determined by the Lorentzian profile simulation. Product kinetic energy distributions and angular distributions for individual rotational lines have been measured. From these distributions, the internal state distributions of the OD radical product as well as the state resolved angular anisotropy parameters for each rotational transition have been obtained. The dramatic variation of the OD product state distributions from different rotational excitations has been observed. These results suggest that there are two distinctive coupling channels from the C state to the lower electronic states: homogenous electronic coupling to the A((1)B(1)) state, resulting in a vibrationally hot OD(X (2)Pi) product and Coriolis-type coupling between the C((1)B(1)) state and the B((1)A(1)) state. Through the second mechanism, OD(X (2)Pi) as well as OD(A (2) summation operator(+)) p...Continue Reading

References

Jan 22, 2002·Physical Review Letters·S A HarichM C van Hemert
Feb 20, 2008·The Journal of Chemical Physics·I-Chung LuXueming Yang
Dec 3, 2008·Proceedings of the National Academy of Sciences of the United States of America·Kaijun YuanRichard N Dixon
Jan 7, 2009·The Review of Scientific Instruments·Kaijun YuanXueming Yang

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Citations

Mar 17, 2011·The Journal of Chemical Physics·Yuan ChengXueming Yang
Oct 23, 2015·The Journal of Physical Chemistry. a·Hongzhen WangXueming Yang
Nov 17, 2015·The Journal of Chemical Physics·Shu SuXueming Yang
Jan 7, 2020·Physical Chemistry Chemical Physics : PCCP·Yao ChangXueming Yang
Apr 24, 2021·The Journal of Physical Chemistry. a·Zijie LuoKaijun Yuan

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