Resonant Auger decay studies in Kr3d3/2,5/2−1npstates using angle-resolved electron imaging spectroscopy

Abstract

An extensive and detailed mapping of the resonant Auger decay of all the photoexcited ${3d}_{3/2,5/2}^{\ensuremath{-}1}\mathrm{np}$ states in Kr has been performed using angle-resolved two-dimensional photoelectron spectroscopy at the Advanced Light Source at Lawrence Berkeley National Laboratory. This has allowed us to obtain angular distributions and spectator and shake probabilities for the Kr ${3d}^{\ensuremath{-}1}n\stackrel{\ensuremath{\rightarrow}}{p}{4s}^{\ensuremath{-}1}{4p}^{\ensuremath{-}1}{(}^{1}{P)mp+e}^{\ensuremath{-}}$ $(n=5--9,$ $m=5--11)$ resonance Auger decays. The results show that the spectator-core coupling is strong at lower n $(n=5,6)$ but lessens for higher n, with a shake-up of $m=n+1$ preferred. The observed trend is in good agreement with the previous experimental and theoretical spectator and shake probabilities for these transitions and also with the analogous decay to the ${4s}^{2}{4p}^{4}\mathrm{mp}$ states [H. Aksela et al., Phys. Rev. Lett. 25, 4970 (1997)]. However, to our knowledge, no prior angular distribution measurements for the Kr ${3d}^{\ensuremath{-}1}n\stackrel{\ensuremath{\rightarrow}}{p}{4s}^{\ensuremath{-}1}{4p}^{\ensuremath{-}1}{(}^{1}{P)mp+e}^{\ensuremath{-}}$ $(n=5--9,$ $m=5--11)$ resonant Auger decay has been reported. These are found to also show similar behavior to the decay to the ${4s}^{2}{4p}^{4}\mathrm{mp}$ states.