Valence fluctuation state of a metastable He atom beam on a metal surface, and singlet-triplet conversion

H. Kawai, A. Yoshimori, M. Nakayama

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The time-dependent expectation value of the triplet metastable He atom is obtained by starting from the singlet state and solving the time-dependent Schrödinger equation directly, to the eighth-order of V, where V is the transfer integral between the conduction electron state and the 2s state of the He atom. The results show that rapid singlet-triplet conversion on the low work-function metal surface occurs through the valence fluctuation state. The quasi-static approximation is demonstrated to be valid to the eighth-order of V. The previously conjectured closed form of the transition rate for the conversion is confirmed.

Original languageEnglish
Pages (from-to)127-132
Number of pages6
JournalSurface Science
Volume363
Issue number1-3
DOIs
Publication statusPublished - Aug 1 1996

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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