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Shape resonance effects in the rotationally resolved photoelectron spectra of O_2

Braunstein, M. and McKoy, V. and Dixit, S. N. and Tonkyn, R. G. and White, M. G. (1990) Shape resonance effects in the rotationally resolved photoelectron spectra of O_2. Journal of Chemical Physics, 93 (7). pp. 5345-5346. ISSN 0021-9606. https://resolver.caltech.edu/CaltechAUTHORS:20151028-114731623

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Abstract

We report the results of theoretical and experimental studies of the rotationally resolved photoelectron spectra of O_2 at low temperature leading to the v^+=0, 1, and 2 levels of the X  ^2Π_g state of O^+_2. A delayed, pulsed field ionization technique is used in conjunction with a coherent VUV radiationsource to obtain high resolution spectra near threshold. The data are compared with theoretical results obtained using static‐exchange photoelectron orbitals and a full description of the mixed Hund’s case (a)–(b) ionic ground state. Agreement with experiment is good, especially for the v^+=1 and v^+=2 levels. Analysis of the rotational branch intensities yields detailed information on the angular momentum composition of the shape resonance near threshold. We also show that the dependence of the electronic transition moment on internuclear distance caused by the shape resonance leads to a significant dependence of the rotational branch intensity on ion vibrational level.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.459654DOIArticle
http://scitation.aip.org/content/aip/journal/jcp/93/7/10.1063/1.459654PublisherArticle
Alternate Title:Shape resonance effects in the rotationally resolved photoelectron spectra of O2
Additional Information:© 1990 American Institute of Physics. (Received 17 May 1990; accepted 20 July 1990) Research at the California Institute of Technology was supported by grants from the National Science Foundation (CHE-85121391), AFOSR (87-0039), and the Office of Health and Environmental Research of DOE (DE-FG03-87ER60513). We also acknowledge use of resources of the San Diego Supercomputer Center, which is supported by the National Science Foundation. M. B. acknowledges a Pacific Northwest Laboratories graduate fellowship. Research at Brookhaven National Laboratory was supported under Contract No. DE-AC02-76CH00016 with the U. S. Department of Energy and by its Division of Chemical Sciences, Office of Basic Energy Sciences. Work done by S. N. D. was performed under the auspices of the U. S. Department of Energy by Lawrence Livermore National Laboratory under Contract No. W-7405-Eng-48.
Funders:
Funding AgencyGrant Number
NSFCHE-85121391
Air Force Office of Scientific Research (AFOSR)87-0039
Department of Energy (DOE)DE-FG03-87ER60513
Pacific Northwest Laboratories Graduate FellowshipUNSPECIFIED
Department of Energy (DOE)DE-AC02-76CH00016
Department of Energy (DOE)W-7405-ENG-48
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Arthur Amos Noyes Laboratory of Chemical Physics8145
Issue or Number:7
Record Number:CaltechAUTHORS:20151028-114731623
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20151028-114731623
Official Citation:Shape resonance effects in the rotationally resolved photoelectron spectra of O2 Braunstein, M. and McKoy, V. and Dixit, S. N. and Tonkyn, R. G. and White, M. G., The Journal of Chemical Physics, 93, 5345-5346 (1990), DOI:http://dx.doi.org/10.1063/1.459654
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61645
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:10 Nov 2015 16:17
Last Modified:03 Oct 2019 09:10

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