Electron resonance spectrum of gaseous SeO in its3Σ and1Δ states

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.