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 language | English (US) |
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Pages (from-to) | 7-14 |
Number of pages | 8 |
Journal | Journal of molecular spectroscopy |
Volume | 295 |
DOIs | |
State | Published - 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