Braunstein, M. and Stephens, J. A. and McKoy, V. (1989) Shape resonance and non-Franck–Condon effects in (2+1) resonant enhanced multiphoton ionization of O2 via the C3Πg state. Journal of Chemical Physics, 90 (2). pp. 633-640. ISSN 0021-9606. http://resolver.caltech.edu/CaltechAUTHORS:BRAjcp89a
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We report vibrationally resolved photoelectron angular distributions for photoionization of the C3Πg Rydberg state of O2. Comparison is made with recent experimental measurements of angular distributions which employ (2+1) resonant enhanced multiphoton ionization of the C3Πg state. The present theory treats the process as single-photon ionization from an unaligned Rydberg state, and qualitatively accounts for much of the observed trends. Non-Franck–Condon effects induced by the kσu shape resonance lead to a substantial dependence of the angular distributions on the vibrational state of the X2Πg ion. Discrepancies between our theoretical results and experiment are qualitatively discussed and tentatively attributed to residual electron correlations.
|Additional Information:||Copyright © 1989 American Institute of Physics. Received 1 August 1988; accepted 29 September 1988. The authors acknowledge helpful discussions with Dr. Richard Dubs. This work was supported by grants from the National Science Foundation (CHE-8521391), Air Force Office of Scientific Research (Contract No. 87-0039), and the Office of Health and Environmental Research of the U.S. Department of Energy (DE-FG03-87ER60513). We also acknowledge use of resources of the San Diego Supercomputer Center, which is supported by the National Science Foundation. Arthur Amos Noyes Laboratory of Chemical Physics, Contribution No. 7822.|
|Subject Keywords:||OXYGEN, PHOTOIONIZATION, MULTI−PHOTON PROCESSES, PHOTOELECTRON SPECTROSCOPY, ANGULAR DISTRIBUTION, RYDBERG STATES, ELECTRON CORRELATION|
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|Deposited On:||26 Nov 2008 20:21|
|Last Modified:||26 Dec 2012 10:32|
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