Angular anisotropy in the Auger decays of resonantly excited Kr 3d^-1_5/25p and Xe 4d^-1_5/26p states

Abstract

The authors present theoretical calculations for the angular anisotropy parameter beta of the resonant Auger decays Kr 3d-15/25p (J=1) to 4p-25p and Xe 4d-15/26p(J=1) to 5p-26p. The transition amplitudes are obtained within a model treating the outer electron as a spectator. Its influence on the final states is taken into account via intermediate coupling MCDF calculations. This model reproduces the unusually large negative beta values observed in the considered transitions. Predictions are given for transitions not yet investigated experimentally.

Resonant Auger decay ofXe*4d5∕2−1O’Keeffe1, Aloïse2, Fritzsche3 et al. 2004Phys. Rev. A102120View full textAdd to dashboardCite

“…To provide a meaningful analysis of the data we performed a set of relativistic multiconfiguration calculations of the Auger decay amplitudes, extending previous theoretical studies of the resonant Auger decay of the Xe * 4d 5/2 −1 6p state [15][16][17][43][44][45][46][47][48][49].…”

Angle-resolved study of the Auger electron cascades following the 1s→3p photoexcitation of Ne

“…Theoretical calculations of the angular anisotropy of the resonant Auger electrons are usually based on the two-step model (Hergenhahn et al 1991). This model has provided a rather accurate description of the experimental data for Ar, Kr and Xe (Hergenhahn et al 1993, Chen 1993 for further references see Armen et al 2000). The calculations for Ne were done by Fritzsche (1995).…”

Angular anisotropy in the resonant Auger decay of 2p-photoexcited Mg

“…Resonant Auger lines are commonly classified as either participator lines, where the excited electron takes part in the decay, or spectator lines, in which it is not involved. A successful theoretical interpretation of the salient features of resonant Auger spectra has been possible within a single-configuration model for all rare gases [4,5], in particular the 2p excitations of Ar, while the effects of CI have been moderately small [6]. The present experimental study of the resonant Auger decay of atomic Mg following 2p~4s, 3d excitation and the theoretical analysis of the angular distributions of the pertinent resonant Auger lines by our multiconfiguration Dirac-Fock (MCDF) calculations are in remarkable contrast to this general trend.…”

“…According to the strict-spectator model (SSM) of resonant Auger decay[4], decay of the 2p3/znspz (J=1) and the 2p, /znst/z (1=1) Resonant Auger spectra of Mg and corresponding P values following 2p3/2 -+4s excitation, left panels, and 2p&/2~4s excitation, right panels. The spectrometer angle with respect to the electric-field vector is given in the upper left hand corner of each panel.…”