Analysis of hyperfine structure in the 0-0 band of the [17.6]2.5-X2.5 transition of iridium monoxide, IrO

A. G. Adam, C. Linton, Timothy Steimle

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Laser induced fluorescence spectra of the [17.6]2.5-X2.5 0-0 band of iridium monoxide, IrO, have been obtained at high resolution (<40 MHz). The hyperfine structure due to 193Ir (I = 3/2) and 191Ir (I = 3/2) is well resolved enabling determination of magnetic (h5/2) and nuclear electric quadrupole (eQq0) hyperfine parameters for the [17.6]2.5 (v = 0) and X2.5 (v = 0) states. The dominant configuration of the ground state is determined by comparing the observed molecular hyperfine parameters with values calculated for several possible ground state configurations using atomic hyperfine parameters. A perturbation calculation suggests that the X2.5 state results from the mixing of the Ω = 5/2 component of the predicted ground 4Δi state with the Ω = 5/2 components of two low-lying excited 2Δ i states.

Original languageEnglish (US)
Pages (from-to)7-14
Number of pages8
JournalJournal of molecular spectroscopy
Volume295
DOIs
StatePublished - Jan 1 2014

Keywords

  • Electron configuration
  • High resolution spectroscopy
  • Hyperfine structure
  • Iridium monoxide
  • Laser-induced fluorescence

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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