Dissociative Photoionization Study of O2

Authors

Y. Lu, Behlen Laboratory of PhysicsFollow
Z. X. He, IBM, Inc.Follow
J. N. Cutler, Wright Patterson AFB
S. H. Southworth, Argonne National Laboratory
Wayne C. Stolte, University of Nevada, Las VegasFollow
J.A. R. Samson, Behlen Laboratory of PhysicsFollow

Document Type

Article

Publication Date

1998

Publication Title

Journal of Electron Spectroscopy and Related Phenomena

Volume

94

Issue

1-2

First page number:

135

Last page number:

147

Abstract

Dissociative photoionization of O₂ is studied by an energy–mass analyzing system and synchrotron radiation. The kinetic energy distribution spectra of the O⁺ ion fragments and the dissociative photoionization efficiency curves for the O⁺ fragments with zero and 0.8 eV kinetic energies are observed at photon energies from 18.5 to 24.7 eV. Two vibrational progressions are observed in the zero kinetic energy O⁺ spectrum and identified as Rydberg series nsơ_g (n = 4 and 5) converging to the 3²II_u ionic state of O₂. The spectroscopic constants for these Rydberg states are obtained. Post dissociative autoionizations are observed for the O^*(²P)ndⁿ(n = 3~5) atomic states in the zero kinetic energy O⁺ spectrum. A shape resonance structure for the B2S− G ionic state is observed in the 0.8 eV kinetic energy O⁺ spectrum. The related dissociation mechanisms are discussed.

Keywords

Auger effect; Dissociative photoionization; Fragmentation reactions; Ion fragment; Kinetic energy; Oxygen molecule; Post dissociative autoionization; Rydberg series; Rydberg states

Disciplines

Analytical Chemistry | Atomic, Molecular and Optical Physics | Biological and Chemical Physics | Elementary Particles and Fields and String Theory | Physical Chemistry

Language

English

Permissions

Use Find in Your Library, contact the author, or use interlibrary loan to garner a copy of the article. Publisher copyright policy allows author to archive post-print (author’s final manuscript). When post-print is available or publisher policy changes, the article will be deposited

Repository Citation

Lu, Y., He, Z. X., Cutler, J. N., Southworth, S. H., Stolte, W. C., Samson, J. R. (1998). Dissociative Photoionization Study of O2. Journal of Electron Spectroscopy and Related Phenomena, 94(1-2), 135-147.