Abstract

Transitions from HgBr $B^2{\Sigma }_{1/2}^{+}$ to higher electronic excited states have been observed in the 270–500-nm wavelength range. The experimental technique involved creation of HgBr(B) through dissociation of HgBr₂ at 193 nm with an ArF laser. HgBr(B) was then pumped to a higher excited state with a dye laser. When on resonance with an upper electronic level, both suppression of the HgBr(B → X) emission (peaking at 502 nm) and emission on the Hg6³P₁ → 6¹S₀ transition at 2537 A were observed. The observed electronic states have for separated atom limits Hg(³P) + Br(²P) and Hg(¹P) + Br(²P). Furthermore, the transitions are strong with peak absorption cross sections of ~5 × 10¹⁷ cm². The identity of these states and their impact on the operation of the blue-green laser are discussed.

© 1988 Optical Society of America