| Popis: |
In alkali halides, interstitial halide atoms are created under ionizing radiations at room temperature and their stabilization is known to play an important role in the coloration process. In alkali iodides such as KI, the coloration efficiency is known to be drastically increased by the addition of divalent cations. By means of Raman experiments, we describe the different stages of formation of V-type defects in the case of Ca+2 doped KI. By using traps like TI+ cations, we show that the interstitial stabilization is different and does not lead to the formation of polyiodides as observed in KI:Ca+2. |
