State-to-state photodissociation dynamics of CO2 around 108 nm: the O(1 S) atom channel

Physical Chemistry Chemical Physics : PCCP
Jiami ZhouXueming Yang

Abstract

State-to-state photodissociation of carbon dioxide (CO2) via the 3p1Πu Rydberg state was investigated by the time-sliced velocity map ion imaging technique (TSVMI) using a tunable vacuum ultraviolet free electron laser (VUV FEL) source. Raw images of the O(1S) products resulting from the O(1S) + CO(X1Σ+) channel were acquired at the photolysis wavelengths between 107.37 and 108.84 nm. From the vibrational resolved O(1S) images, the product total kinetic energy releases and the vibrational state distributions of the CO(X1Σ+) co-products were obtained, respectively. It is found that vibrationally excited CO co-products populate at as high as v = 6 or 7 while peaking at v = 1 and v = 4, and most of the individual vibrational peaks present a bimodal rotational structure. Furthermore, the angular distributions at all studied photolysis wavelengths have also been determined. The associated vibrational-state specific anisotropy parameters (β) exhibit a photolysis wavelength-dependent feature, in which the β-values observed at 108.01 nm and 108.27 nm are more positive than those at 107.37 nm and 107.52 nm, while the β-values have almost isotropic behaviour at 108.84 nm. These experimental results indicate that the initially prepared CO...Continue Reading

References

Aug 11, 2000·Science·L YuI Vasserman
Mar 25, 2010·The Journal of Chemical Physics·Mohammed A Gharaibeh, Dennis J Clouthier
Apr 1, 2011·Physical Chemistry Chemical Physics : PCCP·Zhichao ChenDavid H Parker
Oct 30, 2013·Physical Chemistry Chemical Physics : PCCP·Yu SongWilliam M Jackson
Mar 13, 2014·The Journal of Physical Chemistry. a·Zhiguo ZhangXueming Yang
Apr 2, 2018·The Journal of Chemical Physics·Heilong WangXueming Yang
Mar 21, 2019·Nature Communications·Yao ChangXueming Yang

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Citations

Mar 9, 2021·Physical Chemistry Chemical Physics : PCCP·Caining LingXingan Wang

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Methods Mentioned

BETA
imaging technique

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