Manzhos, Sergei; Romanescu, Constantin; Loock, Hans-Peter and Underwood, Jonathan G.
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|DOI (Digital Object Identifier) Link:||http://doi.org/10.1063/1.1809571|
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A formalism for calculating the angular momentum polarization of an atom or a molecule following two-photon excitation of a J-selected state is presented. This formalism is used to interpret the H atom photofragment angular distributions from single-photon dissociation of two-photon rovibronically state selected HCl and HBr prepared via a Q-branch transition. By comparison of the angular distributions measured using the velocity map imaging technique with the theoretical model it is shown that single-photon dissociation of two-photon prepared states can be used for pathway identification, allowing for the identification of the virtual state symmetry in the two-photon absorption and/or the symmetry of the dissociative state. It is also shown that under conditions of excitation with circularly polarized light, or for excitation via non-Q-branch transitions with linearly polarized light the angular momentum polarization is independent of the dynamics of the two-photon transition and analytically computable.©2004 American Institute of Physics.
|Item Type:||Journal Article|
|Copyright Holders:||2004 American Institute of Physics|
|Keywords:||laser-induced fluorescence; enhanced MPI spectra; molecular photodissociation; nonresonant excitation; diatomic-molecules; reaction dynamics; hydrogen bromide; alignment; orientation; population|
|Academic Unit/Department:||Science > Physical Sciences
|Depositing User:||Astrid Peterkin|
|Date Deposited:||22 Dec 2006|
|Last Modified:||23 Feb 2016 21:30|
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