Abstract

The laser induced fluorescence spectrum of HgBr between 260 and 450 nm (B²Σ⁺ ← X²Σ⁺) and C²Π_1/2 ← X²Σ⁺) has been recorded. Rotationally cold HgBr(X) was produced with both continuous and pulsed corona excited supersonic jet discharge expansions of the precursor HgBr₂ in helium. Full isotopic resolution of the vibronic bandheads was observed for the B²Σ⁺ ← X²Σ⁺ transition. The preliminary vibrational numbering is in agreement with the published assignment from low resolution absorption spectra,¹ and a complete vibrational analysis will yield more precise (~0.3 cm^-1) spectroscopic constants for the B(²Σ⁺) state.

© 1992 Optical Society of America