Resonant Auger decay studies in Kr 3d-13/2,5/2np states using angle-resolved electron imaging spectroscopy

An extensive and detailed mapping of the resonant Auger decay of all the photoexcited 3d(3/2,5/2)(-1)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(-1)np-->4s(-1)4p(-1)(P-1)mp+e(-) (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)p states [H. Aksela et al., Phys. Rev. Lett. 25, 4970 (1997)]. However, to our knowledge, no prior angular distribution measurements for the Kr 3d(-1)np-->4s(-1)4p(-1)(P-1)mp+e(-) (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)mp states. [S1050-2947(99)02301-X].