부산대학교 도서관

The influence of γ-irradiation on the spectral properties of YAG and YAG:Ce (∼0.12 and ∼0.2 at %) single crystals is studied. The interrelation between the changes of γ-induced absorption of Ce and of some color centers in the crystals is established. It is shown that the analysis of radiative behavior of Ce in YAG:Ce crystals gives the opportunity: to evaluate a quantity of electron-hole traps influencing on cerium ions in as-grown crystals and involving in radiation processes of cerium ions recharging; to predict the concentration changes of Ce in the crystals irradiated by doses (1.13-5.5) × 10 rad of γ-rays. The reasons of the activator ions concentration impact on the various radiation behaviors of γ-induced absorption and optical quality of these crystals are discussed. [ABSTRACT FROM AUTHOR]