Remarks on the Spectrum of Gaseous SeO

Abstract
The emission bands observed by Azam and Reddy and ascribed by them to two systems, b1Σ+, a1Δ–X3Σ, of SeO are shown to arise from a single system, b1Σ+–X3Σ. Head-origin separations are employed to derive rough values of Bν′ and these in turn are used to estimate band-origins and thence vibrational constants. The values of the constants derived for b1Σ+ of 80SeO are as follows: Tc = 9724.1 cm−1 (with respect to the minimum in the Ω = 0+, F1 component of X3Σ, Gν = 836.58(ν + 1/2) – 5.11(ν + 1/2)2, and Bν = 0.457 – 0.0034(ν + 1/2). The separation (Ω = 1)c – (Ω = 0+)c in the ground state is found to be 165.8 cm−1.

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