A set of undoped,

-doped and

-codoped

[yttrium aluminum garnet (YAG)] crystals were grown by the Czochralski method and submitted to

irradiation in the dose range 1–236 Gy at RT, to investigate the possibility to reinforce crystal radiation hardness by

doping. The absorption coefficients induced by the irradiation were calculated and analyzed. Crystals also underwent light yield (LY) and scintillation decay measurements using the

and

radioactive sources in 1

time gate. The induced absorption at 550 nm (at the

luminescence peak) decreases with Ce concentration and further decrease is obtained in the

-codoped samples. LY values are independent on the

concentration within 0.12% – 0.3% and on the moderate

codoping as well.