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Ultrafast Relaxation Dynamics Observed Through Time-Resolved Photoelectron Angular Distributions

Lecointre, J.M.; Roberts, G.M.; Horke, D.A.; Verlet, J.R.R.

Ultrafast Relaxation Dynamics Observed Through Time-Resolved Photoelectron Angular Distributions Thumbnail


Authors

J.M. Lecointre

G.M. Roberts

D.A. Horke



Abstract

Time-resolved photoelectron imaging of the 7,7,8,8-tetracyanoquinodimethane (TCNQ) radical anion is presented. Photoelectron angular distributions (PADs) are qualitatively analyzed in terms of the simple s-p model that is based on symmetry arguments. The internal conversion dynamics from the first excited state (12B3u) to the ground state (2B2g) may be observed through temporal changes in the PADs of the spectrally overlapping photoelectron features arising from photodetachment of the ground state and the excited state. A formulism for extracting the population dynamics from the β2 anisotropy parameter of overlapping spectroscopic features is presented. This is used to extract the lifetime of the first excited state, which is in good agreement with that observed in the time-resolved photoelectron spectra.

Citation

Lecointre, J., Roberts, G., Horke, D., & Verlet, J. (2010). Ultrafast Relaxation Dynamics Observed Through Time-Resolved Photoelectron Angular Distributions. The Journal of Physical Chemistry A, 114(42), 11216-11224. https://doi.org/10.1021/jp1028855

Journal Article Type Article
Publication Date Oct 28, 2010
Deposit Date Jan 28, 2016
Publicly Available Date Mar 28, 2024
Journal The Journal of Physical Chemistry A
Print ISSN 1089-5639
Electronic ISSN 1520-5215
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 114
Issue 42
Pages 11216-11224
DOI https://doi.org/10.1021/jp1028855

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Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry A, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/jp1028855




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