The band spectrum of germanous sulphide in emission

Abstract

The band spectrum of germanous sulphide, hitherto known only in absorption, has been excited in emission by means of a heavy-current uncondensed discharge through a mixture of sulphur and germanium dioxide contained in a silica tube, in presence of aluminium. Some 20 new bands lying in the region λ3350-3750 have been measured and assigned to the long-λ end of the main (A X) system of GeS. Analysis of the data on higher vibrational levels of the ground state derived from these bands confirms the values of ω_e'' and x_e'' ω_e'' previously determined from measurements of the system in absorption.