Production behavior of irradiation defects in lithium silicates and silica under ion beam irradiation

For the performance assessment of fusion reactor solid breeder materials, the production behavior of irradiation defects in the ternary lithium ceramics of Li2SiO3 and Li4SiO4 was studied by an in situ luminescence measurement technique under ion beam irradiation of H+ and He+. For comparison the measurement was also performed with vitreous SiO2. The temperature dependence of the luminescence intensity and the transient behavior of the luminescence intensity on temperature changes were measured for kinetic aspects of the involved reactions, and the production mechanisms and kinetics of the irradiation defects in these lithium ceramics were discussed.