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Rotationally resolved photoelectron spectroscopy of the ^2Σ^− Rydberg states of OH: The role of Cooper minima

de Beer, E. and de Lange, C. A. and Stephens, J. A. and Wang, Kwanghsi and McKoy, V. (1991) Rotationally resolved photoelectron spectroscopy of the ^2Σ^− Rydberg states of OH: The role of Cooper minima. Journal of Chemical Physics, 95 (1). pp. 714-716. ISSN 0021-9606. https://resolver.caltech.edu/CaltechAUTHORS:20151028-114733678

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Abstract

We have measured rotationally resolved photoelectron spectra of the OH radical using (2+1) resonance enhanced multiphoton ionizationspectroscopy via the D  ^2Σ^−(3pσ) and 3 ^2Σ^−(4sσ) Rydberg states. For the D  ^2Σ^−(3pσ) state, we observe primarily ΔN=even distributions of ionic rotational states, in contrast to the ΔN=odd distribution expected for ionization of a 3pσ Rydberg electron. The observations are described quantitatively by ab initio calculations which predict a Cooper minimum in the 3pσ→kπ(l=2) channel, whose occurrence determines the ΔN=even ion rotational distribution. In contrast, the 3 ^2Σ^−(4sσ) photoelectron spectra reveal a broad distribution in rotational levels, arising from greater l mixing in the higher Rydberg orbital and much weaker Cooper minima in the continuum.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.461423DOIArticle
http://scitation.aip.org/content/aip/journal/jcp/95/1/10.1063/1.461423PublisherArticle
Alternate Title:Rotationally resolved photoelectron spectroscopy of the 2Σ− Rydberg states of OH: The role of Cooper minima
Additional Information:© 1991 American Institute of Physics. (Received 29 March 1991; accepted 30 April 1991) Work at the University of Amsterdam was supported by the Netherlands Organization for Scientific Research (N.W.O). Work at Caltech was supported by grants from the National Science Foundation (Grant No. 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 (Grant No. DE-FG03-87ER60513), and resources of the Jet Propulsion Laboratory/Caltech Cray X-MP.
Funders:
Funding AgencyGrant Number
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)UNSPECIFIED
NSFCHE-8521391
Air Force Office of Scientific Research (AFOSR)87-0039
Department of Energy (DOE)DE-FG03-87ER60513
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Caltech Arthur Amos Noyes Laboratory of Chemical Physics8419
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Record Number:CaltechAUTHORS:20151028-114733678
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20151028-114733678
Official Citation:Rotationally resolved photoelectron spectroscopy of the 2Σ− Rydberg states of OH: The role of Cooper minima de Beer, E. and de Lange, C. A. and Stephens, J. A. and Wang, Kwanghsi and McKoy, V., The Journal of Chemical Physics, 95, 714-716 (1991), DOI:http://dx.doi.org/10.1063/1.461423
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61653
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:09 Nov 2015 23:33
Last Modified:03 Oct 2019 09:10

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