Complete Auger decay pathways of Kr 3d⁻¹hole levels including direct double processes

Abstract

The detailed level-to-level single and double Auger decay rates of Kr 3d−1 hole states are investigated in the framework of the first and second perturbation theory implemented by distorted wave approximation with the balanced large-scale configuration interaction of the successive ions being taken into account. The branching ratios of cascade and direct double Auger decay to the total probability are predicted to be 16.5% and 16.1%, respectively, for Kr and 16.8% and 17.2% for Kr , resulting in total double branching ratios of 32.6% and 34.0% for the two levels of Kr 3d−1 hole. A comparison is made with the available experimental results on the branching ratio into triply charged ions and good agreement was found with the most recent published work. This work represents the first theoretical study to correctly explain the experimental measurements. The complete pathways were depicted by including the direct double Auger decay process. Compared with the Auger decay of Ar 2p−1, the fraction of the cascade double of Kr 3d−1 is dramatically enhanced yet that of direct double Auger processes is only slightly increased.

Effects of Direct Double Auger Decay on the Population Dynamics of Neon Irradiated by Ultraintense x‐ray Pulses

“…Yet the dominant DDAD mechanism is knock-out (KO) rather than SO for the single and double core hole states of Ne and therefore the investigation of DDAD effects is incomplete. The conclusion that the dominant DDAD mechanism is KO for the inner-shell core hole levels has been demonstrated by our recent work [17,18]. For Ar 2p −1 and Kr 3d −1 core hole levels, we [17,18] determined that the SO mechanism contributes only 5.5% and 22%, respectively, to the total DDAD rates.…”

Collective relaxation processes in atoms, molecules and clusters

“…2, where the diagonal stripes are dominated by intense discrete spots. This observation is in notable contradiction with the calculations of Zeng et al [27]. Using the same approach as for Ar, they obtained for the CDAD and DDAD branching ratios similar values, namely 16.6% and 16.5%, respectively.…”

“…(5) dominates the DDAD transition amplitude. Neglecting the real part, the formula for the KO rate simplifies to [27] …”

Single and double K-shell resonant photoionization and Auger decay of 1s → 2p excited states of O+–O4+

“…The theoretical method for the calculations of the DDAD rates has been described in our recent work (Zeng et al 2013b(Zeng et al , 2013aLiu et al 2014a). In the secondorder perturbation theory, the DDAD rate reads as…”