Knowledge Bank

Hollow cathode excitation spectra of $InCl3/In/He$ mixtures are rich in bands throughout the 320 - 335 and 360 - 420 nm regions. Some of these bands have hitherto been attributed to the $InCl-ion1$, while others had been assigned to the neutral InCl $species2$ or remained unassigned. These spectra have been critically re-examined, Franck-Condon factors have been computed, and virtually all of the observed bands can be satisfactorily accounted for. The so-called $A\prime -X$ bands of InCl in the 360 - 420 run region are shown to be due to InCl'. Vibrational and rotational data in support of the assignments /reassignments will be presented.