Lasing due to transitions in tellurium dimers pumped optically with radiation from an He–Sr recombination laser

Lasing was observed at 14 wavelengths in the yellow-red part of the spectrum as a result of electronic transitions in the Te₂ molecule in tellurium vapor pumped optically by He–Sr recombination laser radiation (λ = 430.5 nm). The strongest lasing lines corresponded to the BO_u⁺ (ν' = 1–4) →XO_g⁺ (ν'' = 36–38) transition in the ¹²⁸Te₂ or ¹³⁰Te ¹²⁶Te molecules.