Abstract
Mass spectra and photoionization yield curves are obtained for the molecular and atomic ions of chlorine monofluoride. The atomic ions are formed both by ion-pair and by dissociative ionization processes, although the F+ ion formed by the latter process is too weak for quantitative measurements. The ClF+ curve exhibits a weak onset at 12.55 eV, ascribed to a hot band. An intense onset at 12.65 eV is ascribed to the (0, 0) transition. The observed thresholds for the Cl+ ion support the spectroscopic determination of D(ClF) = 2.558 eV and, combined with a recent determination of the heat of formation of ClF, support the previously reported photoionization value of D0°(F2) = 1.34 eV.
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