Super-Coster-Kronig decay of Kr 3p core-hole states studied by multielectron coincidence spectroscopy
2021
Super Coster-Kronig (SCK) decay following Kr $3p$ photoionization has been investigated using a multielectron coincidence method. It is found that the SCK pathway occupies 23% of the $3{p}_{1/2}$ decay and only 2.5% of the $3{p}_{3/2}$ decay. The significant difference between the two $3p$ spin-orbit levels mainly results from the difference in energetics: almost all SCK transitions are energetically allowed in the $3{p}_{1/2}$ decay but only SCK transitions to the $^{3}F$ levels of $3{d}^{\ensuremath{-}2}$ are possible in the $3{p}_{3/2}$ decay. Subsequent decay processes from the SCK-final $3{d}^{\ensuremath{-}2}$ states are investigated, where a maximum of fivefold electron coincidences are analyzed.
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