Bromine emission spectra of discharged mixtures of argon + bromine-containing compounds

Abstract

The u.v. emission spectra of Br₂ observed from discharged mixtures of argon and various bromine-containing compounds (Ar + RB₁) are studied in a flow system at low pressure. Evidence for different Br^*₂ formation mechanisms in Ar + Br₂ is presented. The dominant Br^*₂ formation mechanism in other systems (Ar + RBr, R ≠ Br) is most probably an exchange reaction of Br^* with RBr. The origin of the Br₂ spectrum on the short-wavelength side of the 290 nm D′–A′ band is discussed. Our analyses suggest that the D′–A′ transition makes a major contribution to the total intensity in the 240–290 nm region in Ar + RBr, R ≠ Br.