Resonant fluorescence of gaseous bromine excited by the 5145 Å radiation of a single longitudinal mode argon ion laser

Abstract

The resonant fluorescent spectra of gaseous bromine excited by the single longitudinal mode 5145 Å radiation of an argon ion laser were reinvestigated. Three new transitions were found in addition to the five previously reported. The excitation frequency and the fluorescent line positions from Δ v = 1 to Δ v = 9 were carefully measured for each of the eight transitions. The fluorescent lines of Δ v = 5 and Δ v = 10 are too weak to be detected. The isotopic molecules and the vibration-rotation states involved were assigned. All the fluorescent line positions up to Δ v = 10 were calculated, and they agreed with the observed values to within 0.2 cm −1. The relative intensities in each progression also agreed with the known Franck-Condon factors.