Resonant Auger decay studies in Kr 3d(3/2,5/2)(-1)np states using angle-resolved electron imaging spectroscopy

An extensive and detailed mapping of the resonant Auger decay of all the ph otoexcited 3d(3/2,5/2)(-1)np states in Kr has been performed using angle-re solved two-dimensional photoelectron spectroscopy at the Advanced Light Sou rce 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. Th e 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 o bserved trend is in good agreement with the previous experimental and theor etical spectator and shake probabilities for these transitions and also wit h the analogous decay to the 4s(2)4p(4)p states [H. Aksela et al., Phys. Re v. Lett. 25, 4970 (1997)]. However, to our knowledge, no prior angular dist ribution 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].