Gerade Rydberg states of Xe2 probed by laser spectroscopy in the afterglow of a Xe microplasma: Ωg ← a3 Σu+ ( 1u, Ou- ) transitions in the near-infrared (675-800 nm)

C. J. Wagner, J. G. Eden

Research output: Contribution to journalArticlepeer-review

Abstract

Gerade Rydberg states of Xe2 lying 12 500-14 800 cm-1 above the a3 Σu+ ( 1u, Ou- ) metastable levels of the dimer have been observed by laser spectroscopy in the afterglow of a Xe microplasma with a volume of ∼160 nL. Photoexcitation of Ωg ← a3 Σu+ ( 1u, Ou- ) (Rydberg ← Rydberg) state transitions at small internuclear separations ( R ≃ Re ( Xe2+ ) ) while monitoring the suppression of Xe2 ( Ou+ → Og+ ) spontaneous emission in the ultraviolet confirms the presence of an extensive series of red-degraded vibrational bands in the 675-800 nm region that are tentatively identified with an Ω = 1 upper state with a molecular ion core having predominantly B2Π3/2g character. Spectral simulations yield the following constants for the 1g state: Re = 3.49 ± 0.1 Å, Te = 12 980 ± 70 cm-1, ωe = 122 ± 3 cm-1, ωe xe = 0.9 ± 0.2 cm-1, and De = 2250 ± 70 cm-1.

Original languageEnglish (US)
Pages (from-to)372-377
Number of pages6
JournalChemical Physics Letters
Volume422
Issue number4-6
DOIs
StatePublished - May 10 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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