Emission spectrum of bromine excited in the presence of argon. Part II. The band system in the region 3150-2970 Å

Abstract

The wavelengths and wavenumbers of the band heads of the system 3150-2970 Å as obtained from the plates taken on the first order 21' grating spectrograph are given along with the vibrational analysis. This system is shown to be due to a transition from an upper electronic state at T_e = 48516 cm.⁻¹ with ω ' _e = 162·0 cm.⁻¹ and ω' ^e χ ' _e = 0·29 cm.⁻¹ to the well-known³ ∏_u (O _u ⁺) state at T_e = 15918 cm.⁻¹ This lower state is common with that of the system 2950-2670 Å.