Effects of pre-irradiation treatment on EPR,optical absorption and TL of albite

In the present work pre-irradiation annealing effect was investigated in albite, NaAlSi 3 O 8 , a silicate crystal. Albite powder samples were heated at 500, 600, 700, 800 and 900 v C for 40 minutes, and then submitted to n -irradiation. Results show that first TL peak (around 160 v C) decreases with annealing temperature, while higher temperature peaks strongly increase. EPR signal around g factor 2, attributed to Al-O m -Al centers, increase with annealing temperature too, as well as optical absorption bands that appear in the crystal after relatively strong n -dose irradiation (of some kGys).