On the analogy between local modes and color center absorption bands

2014 The absorption and emission bands of F aggregate centers are compared with the local modes of Hand Dions substituting the halogen ions in alkali halides. It is shown that the energies of the band maxima of F aggregate centers are proportional to the local vibrational mode energies of the Hor Dions. Because of these correlations, the bands of the F aggregate centers are considered to be due to the excitation of local harmonic oscillators. From this simple picture 2014 how oversimplified it may be 2014 a series of predictions can be drawn, which are in fair agreement with experiment. J. Physique 41 (1980) 359-364 AVRIL 1980, Classification Physics Abstracts 61.70D 63.20P