Abstract
The gas-phase infrared spectrum of the main isotopic form of strontium monohydride, 88SrH in natural abundance (82%), in the ground electronic state ( 2Σ +) has been observed using a diode laser spectrometer. Coupling between the unpaired electron and the overall rotation results in each individual transition being split into a doublet. The wavenumbers of eleven transitions of the ν=1←0 band, eight transitions of the ν=2←1 band and eight transitions of the ν=3←2 band have been measured with a nominal accuracy of ±0.001 cm −1. In all cases the spin-rotational splitting (γ splitting), which lay between 0.16 and 0.05 cm −1, was easily resolved and we were able to determine higher-order correction terms.
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