Lifetime Broadening and CI-Resonances Observed in ESCA

1 October 1976

journal article
Published by IOP Publishing in Physica Scripta

Vol. 14 (4) , 141-147
https://doi.org/10.1088/0031-8949/14/4/004

Abstract

The electron spectrum of the M ₂ and M ₃ levels in bromine and krypton have been studied by high resolution ESCA. The M ₁ M _2,3 M _2,3 super Coster-Kronig transitions become energetically forbidden for Zless than sim-36 (Kr) and recent calculations therefore predict a decrease in the M ₂ and M ₃ natural linewidths around krypton in the periodic system. The experiment shows that the 3p _3/2 linewidth is smaller in Kr than in Br. It is, however, also found that this decrease in linewidth is followed by configuration interaction (CI) between 3p ² P and 3d ² nl*² P states. Several descrete CI resonances are observed in the Kr 3p spectrum. Such resonances are also studied in the N shell for the elements from Te (Z = 52) to Ba (Z = 56). For these elements the effect is found to be much larger due to the strong collective character of 4d-nf* excitations.

Keywords

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