Chemiluminescence of argon bromide. I. The emission spectrum of ArBr

In this first systematic study of the ArBr molecule, chemiluminescence spectra are generated by the reactions of metastable argon atoms with bromine-containing compounds. Three continua, due to the B (1/2)−X (1/2), B (1/2)−A (1/2) and C (3/2)−A3/2) transitions are characterized, their pressure dependences examined, and the extent of their overlap discussed in some detail. From the temperture dependence of the spectra, an upper limit for the electronic energy of the B (1/2) state is derived: TeB?61 850 cm−1.