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Rotational branching ratios and photoelectron angular distributions in resonance enhanced multiphoton ionization of HBr via the F ^1Δ_2 Rydberg state

Wang, Kwanghsi and McKoy, V. (1991) Rotational branching ratios and photoelectron angular distributions in resonance enhanced multiphoton ionization of HBr via the F ^1Δ_2 Rydberg state. Journal of Chemical Physics, 95 (11). pp. 7872-7879. ISSN 0021-9606. https://resolver.caltech.edu/CaltechAUTHORS:20151028-114735018

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Abstract

Results of theoretical studies of rotational ion distributions in the X ^2Π_(1/2) ground state of HB^r+ resulting from (2+1) resonance enhanced multiphoton ionization (REMPI) via the S(2) branch of the F ^1Δ_2 Rydberg state are reported. These results show a strongly parity‐favored ion distribution with about 80% population in the (−) component of the Λ doublet of J^+ rotational levels. The 20% population in the other parity component of the Λ doublet can be seen to be due to odd partial wave contributions to the photoelectron matrix elements which arise primarily from non‐atomic‐like behavior of the electronic continuum. This, in turn, is due to angular momentum coupling in the photoelectron orbital brought about by the torques of the nonspherical molecular ion potential. We demonstrate that the effect of alignment on these ion distributions, although not large, is important. Photoelectron angular distributions and alignment of the J levels of the HBr^+ ions are also presented. Rotational branching ratios and photoelectron angular distributions resulting from (2+1’) REMPI of HBr via several S branches of the F ^1Δ_2 state are also shown for near‐threshold photoelectron energies.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.461316DOIArticle
http://scitation.aip.org/content/aip/journal/jcp/95/11/10.1063/1.461316PublisherArticle
Alternate Title:Rotational branching ratios and photoelectron angular distributions in resonance enhanced multiphoton ionization of HBr via the F 1Δ2 Rydberg state
Additional Information:© 1991 American Institute of Physics. (Received 11 July 1991; accepted 27 August 1991) This work was supported by grants from the National Science Foundation, Air Force Office of Scientific Research, and the Office of Health and Environmental Research of the U.S. Department of Energy. We acknowledge use of resources of the IPL/Caltech CRAY X-MP/18 Supercomputer. We also thank Dr. Jinchun Xie and Professor Richard Zare for kindly making their experimental data available to us prior to publication.
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Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
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Caltech Arthur Amos Noyes Laboratory of Chemical Physics8472
Issue or Number:11
Record Number:CaltechAUTHORS:20151028-114735018
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20151028-114735018
Official Citation:Rotational branching ratios and photoelectron angular distributions in resonance enhanced multiphoton ionization of HBr via the F  1Δ2 Rydberg state Wang, Kwanghsi and McKoy, V., The Journal of Chemical Physics, 95, 7872-7879 (1991), DOI:http://dx.doi.org/10.1063/1.461316
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61658
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:06 Nov 2015 22:21
Last Modified:03 Oct 2019 09:10

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