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

- High resolution spectra show well resolved hyperfine structure.
- Analysis yields magnetic and electric nuclear quadrupole hyperfine parameters.
- Atomic Ir hyperfine parameters used to determine calculated IrO parameters.
- Comparing observed and calculated parameters yields IrO ground state configuration.
- Calculation suggests Ω = 5/2 ground state arises from strong 4Δ5/2-2Δ5/2 interactions.