b1Σ+ and a1Δ emissions from group VI-VI diatomic molecules: b0+ → X10+, x21 emissions of TeO and TeS

Near infrared emissions of the b0⁺→X₁0⁺, X₂1 band systems of TeO and TeS have been observed by chemiluminescence studies in a fast flow system. In both cases the b → X₁ and b → X₂ subtransitions were found to occur with similar intensities. Analysis of the spectra yielded values of the b0⁺ energies T_e of 9966 ^± 10 cm^?1 and 8457 ^± 10 cm^?1 for TeO and TeS, respectively, and vibrational separations ω_e in these states of 726 ^± 10 cm^?1 and 436 ^± 5 cm^?1. The energy splittings of the X₁0⁺ and X₂1 ground state levels were determined to be 789 ^± 10 cm^?1 and 829 ^± 5 cm^?1.