Interpretation of high energy photoelectron spectra satellite peaks by semi-empirical molecular orbital calculations

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Abstract
The sudden approximation is used to calculate the position and intensity of satellites accompanying core ionization in a series of molecules utilizing wavefunctions calculated in the INDO approximation. The results show semi-quantitative agreement with experiment and allow the assignment of various satellites to particular excitations accompanying primary ionization (shake-up). It is shown that in the case of degenerate hole states a localized hole state approximation is needed in order to interpret the satellites.

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