Unusual degree of angular anisotropy in the resonant Auger spectrum of Kr

Abstract

The angular distribution parameter, \ensuremath{\beta}, has been measured for the resonant Auger spectra in Kr following 3d\ensuremath{\rightarrow}5p excitation. Unusually low values, close to -1, were seen for two bands. From optical spectroscopy data these bands are assigned to the final states 4${\mathit{p}}^{4}$${(}^{3}$P)5p${(}^{4}$${\mathit{P}}_{5/2}$, $^{4}$${\mathit{P}}_{3/2}$, and $^{4}$${\mathit{D}}_{5/2}$). According to angular momentum transfer theory, some of the transitions could be parity unfavored, yielding \ensuremath{\beta} values of -1, but additional theory is required for a complete understanding. Implications for angular studies of highly resolved Auger spectra are discussed.