Evidence for Atomic Processes in Molecular Valence Double Ionization

Authors

U. Becker, Fritz-Haber-Institut der Max-Planck-Gesellschaft
Oliver Hemmers, University of Nevada, Las VegasFollow
B. Langer, Western Michigan University, Kalamazoo
A. Menzel, Fritz-Haber-Institut de Max-Planck-Gesellschaft
R. Wehlitz, University of Tennessee, KnoxvilleFollow
W. B. Peatman, Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung

Document Type

Article

Publication Date

2-1992

Publication Title

Physical Review A

Publisher

American Physical Society

Volume

45

Issue

3

First page number:

R1295

Last page number:

R1298

Abstract

Complete molecular valence-electron spectra were measured for CO. Unexpectedly, discrete lines at low kinetic energies were found, superimposed on a continuous energy spectrum representing direct double-ionization processes. The appearance of these lines is discussed in the context of the formation of the C⁺+O⁺ ion pair near its associated threshold at 38.4 eV. It is ascribed to valence-excited repulsive (CO⁺)^* states, which dissociate to a large part rapidly into atomic fragments before electronic relaxation takes place. From our spectra, partial cross sections for the different processes leading to dissociative valence double ionization are derived.

Controlled Subject

Carbon monoxide; Carbon monoxide--Spectra; Photoelectron spectroscopy; Photoionization

Disciplines

Atomic, Molecular and Optical Physics | Physical Chemistry

File Format

pdf

File Size

245 KB

Language

English

Permissions

Copyright American Physical Society. Used with permission.

Rights

IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/

Repository Citation

Becker, U., Hemmers, O., Langer, B., Menzel, A., Wehlitz, R., Peatman, W. B. (1992). Evidence for Atomic Processes in Molecular Valence Double Ionization. Physical Review A, 45(3), R1295-R1298.
https://digitalscholarship.unlv.edu/hrc_fac_articles/56