Associative ionization in collisions of electronically excited Na atoms with vibrationally excited Na2(v″) molecules

A. Ekers*, O. Kaufmann, M. Keil, K. Bergmann

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We have studied the formation of Na+3 ions in collisions of Na(3d, 5s, 4d) atoms with vibrationally excited Na2(v″) molecules in their electronic ground state in a supersonic beam. The cross-section of the Na(4d5/2) + Na2 associative ionization is found to be about six times larger than that of the corresponding atomic reaction Na(4d5/2) + Na(3s) → Na+2. Associative ionization in collisions of Na(3d) with Na2(v″) is observed only with vibrationally excited Na2 molecules. The cross-section σ(v″) of this reaction increases only slightly with v″ for low vibrational excitation, while a strong increase with v″ is observed for v″ ≥ 26. The latter observation suggests the opening of the channel leading to the formation of Na+3 ions in the first electronically excited state for v″ ≥ 26.

Original languageEnglish (US)
Pages (from-to)65-71
Number of pages7
JournalEuropean Physical Journal D
Volume7
Issue number1
StatePublished - Aug 1999
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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