Braunstein, M. and McKoy, V. (1989) Multiplet-specific shape resonant features in vibrationally resolved 3σ_g photoionization of O_2. Journal of Chemical Physics, 91 (1). pp. 150-154. ISSN 0021-9606. http://resolver.caltech.edu/CaltechAUTHORS:20120531-072128473
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We report multiplet‐specific vibrationally resolved photoionization cross sections and photoelectron angular distributions for the 3σ_g orbital of O_2 leading to the v^+=0–3 levels of the b^4Σ^−_g and B^2Σ^−_g states of O^+_2. These studies were motivated by recent work which shows significant nonstatistical behavior in the vibrationally unresolved spectrum at low photoelectron energies arising from the sensitivity of the kσ_u shape resonance to the multiplet‐specific exchange potentials. In addition to the anticipated non‐Franck–Condon vibrational distributions arising from the kσ_u shape resonance, we also find substantial nonstatistical effects in our vibrationally resolved cross sections and particularly in our photoelectron angular distributions over a broad energy range. Extensive electronic autoionization due to Rydberg levels leading to the c^ 4Σ^−_u (2σ^(−1)_u) ion makes it difficult to assess these effects in the available experimental data.
|Additional Information:||© 1989 American Institute of Physics. Received 7 February 1989; accepted 21 March 1989. This material is based upon research supported by the National Science Foundation under Grant No. CHE85-21391. The authors also acknowledge use of the resources of the San Diego SuperComputer Center which is supported by the National Science Foundation.|
|Subject Keywords:||PHOTOIONIZATION, PHOTOELECTRON SPECTROSCOPY, VIBRATIONAL STATES, ANGULAR DISTRIBUTION, CROSS SECTIONS, OXYGEN, AUTOIONIZATION, RYDBERG STATES|
|Classification Code:||PACS: 33.80.Rv; 33.60.+q|
|Official Citation:||Multiplet‐specific shape resonant features in vibrationally resolved 3σg photoionization of O2 M. Braunstein and V. McKoy J. Chem. Phys. 91, 150 (1989); http://dx.doi.org/10.1063/1.457493|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||31 May 2012 15:11|
|Last Modified:||26 Dec 2012 15:17|
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