About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Physical Review A
Paper
Origin of satellite structure in the valence X-ray photoelectron spectrum of CO: A theoretical study
Abstract
The satellite structure in the valence shell x-ray photoelectron spectrum (XPS) of CO is studied. The configuration interaction method is used to construct correlated many-electron wave functions for the different final states of CO+. It is found that (1) the conventional shake-up model cannot explain the satellite structure; (2) a considerable amount of intensity is lost from the main, "single-hole," î+2 states (3σ-1, 4σ-1, and 5σ-1) due to electron correlation; and (3) the 3σ-1 peak satellites are at lower, rather than higher, binding energy than the main peak. Franck-Condon broadening is estimated and shown to be a major cause of the large width of the observed structures on the high-binding-energy side of the 4σ-1 peak. Our conclusions are supported by the results of other electron spectroscopies in addition to XPS. © 1977 The American Physical Society.