Double-autoionization decay of resonantly excited single-electron states

M. Ya Amusia, V. A. Kilin, A. Ehresmann, H. Schmoranzer, K. H. Schartner

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Perturbation theory in the lowest non-vanishing order in interelectron interaction has been applied to the theoretical investigation of double-ionization decays of resonantly excited single-electron states. The formulae for the transition probabilities were derived in the LS coupling scheme, and the orbital angular momentum and spin selection rules were obtained. In addition to the formulae, which are exact in this order, three approximate expressions, which correspond to illustrative model mechanisms of the transition, were derived as limiting cases of the exact ones. Numerical results were obtained for the decay of the resonantly excited Kr i 3d-15p[1P] state which demonstrated quite clearly the important role of the interelectron interaction in double-ionization processes. On the other hand, the results obtained show that low-energy electrons can appear in the photoelectron spectrum below the ionization threshold of the 3d shell. As a function of the photon frequency, the yield of these low-energy electrons is strongly amplified by the resonant transition of the 3d electron to 5p (or to other discrete levels), acting as an intermediate state, when the photon frequency approaches that of the transition.

Original languageEnglish
Pages (from-to)1281-1300
Number of pages20
JournalJournal of Physics D: Applied Physics
Volume26
Issue number7
DOIs
Publication statusPublished - 14 Jul 1993

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films
  • Electronic, Optical and Magnetic Materials

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