Hyperfine structure and Stark effect in the [18.0] 4 - X3Φ4transition of iridium hydride, IrH and [18.2] 4 - X3Φ4transition of iridium deuteride, IrD

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

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


High resolution spectra of IrH and IrD, with full width at half maximum (FWHM) of ∼0.001 cm-1, have shown well resolved hyperfine structure due to the nuclear spin, I = 3/2, of 193Ir and 191Ir. Analysis of the hyperfine structure in the [18.2] 4 - X3Φ4transition of 193IrD and 191IrD yielded well defined magnetic and quadrupole Ir hyperfine parameters which showed that the ground X3Φ4state originates predominantly from the two open-shell Ir(5dπ35dδ3) configuration with a significant contribution from the four open-shell Ir(5dσ5dπ35dδ36sσ) configuration. Examination of the Stark effect in the [18.0] 4 - X3Φ4transition of 193IrH yielded electric dipole moments of 1.23(1) D and 0.76(1) D for the ground and excited states, respectively. The hyperfine constants and the dipole moment of the ground state are seen to follow the trend shown by the isovalent molecules, CoF, CoH and IrF.

Original languageEnglish (US)
Pages (from-to)37-42
Number of pages6
JournalJournal of molecular spectroscopy
StatePublished - Oct 2014


  • Dipole moment
  • Electron configuration
  • Hyperfine structure
  • Iridium hydride and deuteride
  • Laser-induced fluorescence
  • Stark effect

ASJC Scopus subject areas

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


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