Vibrational Quantum Analysis of the Visible Absorption Bands of Bromine

Abstract

The absorption bands of bromine from 5100A to 7600A are classified into two band systems having a common lower level. One of these includes nearly all of the previously recorded bands of bromine while the other comprises a group of relatively weak bands lying in the extreme red. The upper level of the extreme red system differs from that of the main system in that it dissociates into normal atoms. Measurements of the vibrational isotope effect are given for a number of bands in the main system leading to a revision of the quantum numbering and of the vibrational constants.