CO-2+ IN BAF2 - ANALYSIS OF INDUCED IR ABSORPTION

The IR absorption spectrum of BaF//2:Co**2** plus has been interpreted with the help of a Green's function formalism applied to a force and mass defect due to Co**2** plus ions. For BaF//2:Co**2** plus , the experimental absorption coefficient shows a peak of weak intensity at 161 cm** minus **1, two strong ones at 112 and 138 cm** minus **1 and a large band including two peaks at 83. 5 and 89 cm** minus **1.