CaltechAUTHORS
  A Caltech Library Service

Shape resonance behavior in 1π_g photoionization of O_2

Braunstein, M. and McKoy, V. (1989) Shape resonance behavior in 1π_g photoionization of O_2. Journal of Chemical Physics, 90 (5). pp. 2575-2579. ISSN 0021-9606. http://resolver.caltech.edu/CaltechAUTHORS:20120531-065532856

[img]
Preview
PDF - Published Version
See Usage Policy.

332Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20120531-065532856

Abstract

We report calculations of vibrationally resolved cross sections and photoelectron angular distributions for photoionization of O_2 leading to the X^ 2 Π_g (ν^+ =0–4) states of O^+_2 using Hartree–Fock continuum photoelectron orbitals. These studies were motivated by recent results which show that a σ_u shape resonance plays a dominant role in producing non‐Franck–Condon vibrational distributions in resonant multiphoton ionization of O_2 via the C ^3Π_g (1π_g3sσ_g) Rydberg state. In the present study, we investigate how this shape resonance influences photoionization dynamics in single‐photon ionization. Below 21 eV photon energy, we find significant non‐Franck–Condon effects in the vibrational branching ratios as well as in the vibrationally resolved photoelectron angular distributions. Substantial autoionization hinders a direct comparison between theory and experiment.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.455954DOIUNSPECIFIED
http://jcp.aip.org/resource/1/jcpsa6/v90/i5/p2575_s1PublisherUNSPECIFIED
Additional Information:© 1989 American Institute of Physics. Received 10 October 1988; accepted 9 November 1988. This material is based upon research supported by the National Science Foundation under Grant No. CHE85-21391. The authors acknowledge use of the resources of the San Diego SuperComputer Center which is supported by the National Science Foundation. The authors also thank Dr. J. A. Stephens for helpful discussions and suggestions.
Funders:
Funding AgencyGrant Number
NSFCHE85-21391
Subject Keywords:PHOTOIONIZATION, MULTI−PHOTON PROCESSES, OXYGEN, RYDBERG STATES, VIBRATIONAL STATES, RESONANCE, PHOTOELECTRON SPECTROSCOPY, ANGULAR DISTRIBUTION, CROSS SECTIONS, BRANCHING RATIO
Classification Code:PACS: 33.60.+q; 33.80.Rv; 33.20.Tp
Record Number:CaltechAUTHORS:20120531-065532856
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20120531-065532856
Official Citation:Shape resonance behavior in 1πg photoionization of O2 M. Braunstein and V. McKoy J. Chem. Phys. 90, 2575 (1989); http://dx.doi.org/10.1063/1.455954
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:31728
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:31 May 2012 15:21
Last Modified:26 Dec 2012 15:17

Repository Staff Only: item control page