Key points are not available for this paper at this time.
Measurements have been made of the F-center absorption band in KCl, KBr, KI, NaCl, and LiF in the range from 4^ to 300^. Analysis of these data shows that the important ionic vibrational frequency influencing the F-center is considerably lower than that of the lattice, indicating that a configuration coordinate curve model may be the appropriate one to use, rather than the continuous dielectric model. Using the peak of the F-center emission bands as determined by Botden, van Doorn, and Haven, and the present absorption data, configuration coordinate curves are computed for the ground and excited state curves of F-centers in KCl, KBr, KI, and NaCl. Using these curves, predictions of the emission band-widths are found to be in agreement with experiment except for the case of KCl. The low efficiency of F-center luminescence may be understood by applying the criterion for luminescence proposed by Dexter, Klick, and Russell to these configuration coordinate curves.
Russell et al. (Thu,) studied this question.