Velocity map imaging study of BrCl photodissociation at 467 nm: Determination of all odd-rank (K=1 and 3) anisotropy parameters for the Cl(P3∕202) photofragments

Autor:	Andrey G. Smolin, Andrew J. Orr-Ewing, Oleg S. Vasyutinskii, Gabriel G. Balint-Kurti, Michael N. R. Ashfold, Olivier P. J. Vieuxmaire
Rok vydání:	2006
Předmět:	Angular momentum Chemistry Linear polarization Ionization Photodissociation General Physics and Astronomy Photoionization Physical and Theoretical Chemistry Atomic physics Polarization (waves) Anisotropy Excitation
Zdroj:	The Journal of Chemical Physics. 124:094305
ISSN:	1089-7690 0021-9606
DOI:	10.1063/1.2168149
Popis:	Resonance-enhanced multiphoton ionization and velocity map imaging of the Cl(P3∕202) fragments of BrCl photolysis at 467.16 nm have been used to obtain a complete set of orientation parameters (with ranks K=1 and 3) describing the polarization of the electronic angular momentum. The experiments employ two geometries distinguished only by the circular or linear polarization of the photolysis laser beam. Normalized difference images constructed from the data accumulated using a right or left circularly polarized probe-laser beam, counterpropagating with the photolysis laser, were fitted to basis images corresponding to contributions from various odd-rank anisotropy parameters. Expressions are given for the difference images in terms of the K=1 and 3 anisotropy parameters, which describe coherent and incoherent parallel and perpendicular excitation and dissociation mechanisms. The nonzero values of the anisotropy parameters are indicative of nonadiabatic dissociation dynamics, with likely contributions from ...
Databáze:	OpenAIRE
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