Shape resonance effects in the rotationally resolved photoelectron spectra of O_2
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.
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.Attached Files
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Additional details
- Alternative title
- Shape resonance effects in the rotationally resolved photoelectron spectra of O2
- Eprint ID
- 61645
- Resolver ID
- CaltechAUTHORS:20151028-114731623
- CHE-85121391
- NSF
- 87-0039
- Air Force Office of Scientific Research (AFOSR)
- DE-FG03-87ER60513
- Department of Energy (DOE)
- Pacific Northwest Laboratories Graduate Fellowship
- DE-AC02-76CH00016
- Department of Energy (DOE)
- W-7405-ENG-48
- Department of Energy (DOE)
- Created
-
2015-11-10Created from EPrint's datestamp field
- Updated
-
2021-11-10Created from EPrint's last_modified field
- Other Numbering System Name
- Caltech Arthur Amos Noyes Laboratory of Chemical Physics
- Other Numbering System Identifier
- 8145