The optical and optical/Stark spectrum of iridium monocarbide and mononitride

A. J. Marr, M. E. Flores, Timothy Steimle

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Abstract

Supersonic molecular beam samples of iridium monocarbide IrC and iridium mononitride IrN were generated using a laser ablation/reaction source and characterized using high resolution (Δν<30 MHz FWHM) laser induced fluorescence spectroscopy. This is the first identification of gaseous IrN. Numerous strong band systems in the 18 800 to 14 360 cm-1 spectral range were assigned as the (v′,0) progression of the A 1Π-Χ 1Σ+ band system of IrN. The (1,0) and (0,0) bands were analyzed to produce a set of fine and hyperfine parameters. The electric field induced effects on the R(0) line of these bands were analyzed to produce permanent electric dipole moments: A 1Π(v = 0) 2.78(2) D, A 1Π(v = 1) 2.64(2) D, Χ 1Σ+(v = 0) = 1.66(1) D. The (0,0) band of the D2 Φ7/22Δ5/2 system of IrC was recorded and analyzed to produce a set of fine and hyperfine parameters. The electric field induced effects on the R(2.5) branch feature were analyzed to produce permanent electric dipole moments: D 2Φ7/2(v = 0) 2.61(6) D and Χ 2Δ5/2(v = 0) 1.60(7) D. Plausible electronic configurations consistent with the experimental observations are given.

Original languageEnglish (US)
Pages (from-to)8183-8196
Number of pages14
JournalJournal of Chemical Physics
Volume104
Issue number21
DOIs
StatePublished - Jun 1 1996

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ASJC Scopus subject areas

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

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