Radiation induced recharging of Ce3+ and Ce4+ ions in Ce and Nd doped yttrium-aluminium garnet crystals was observed. This influence is dependent upon the Ce3+ ion concentration and the kind of ionizing radiation.Increased two.86 µm emission similar to Ho³�? ⁵I6→⁵I7 was achieved in Nd³�?Ho³�?codoped CaLaGa3O7 crystal for the first t