Abstract
The gas phase electron resonance spectrum of SeO in its 3Σ and 1Δ states has been studied. Values of the rotational constant B 0 and ‘spin-spin’ splitting parameter λ in the 3Σ state, previously determined from the ultraviolet spectrum, are shown to be consistent with the electron resonance results, and we are also able to estimate the spin-rotation interaction constant. In addition, the 3Σ spectrum shows 77Se hyperfine structure. The 1Δ spectrum yields values for the rotational constant (and hence bond length) and rotational g factor.
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