Production behavior of irradiation defects in α-alumina and sapphire under ion beam irradiation

Production and reaction kinetics of radiation-induced defects in α-alumina and sapphire under ion beam irradiation

“…Procedures were mostly the same as those in the previous study [2]. The pellet-type specimens of a-alumina (Al 2 O 3 : 99.9%, SiO 2 : 0.04%, Na 2 O: 0.02%, MgO: 0.01%, CaO: 0.01%, Fe 2 O 3 : <0.01% [3]) and sapphire were obtained from Kyocera Co. Ltd., which were of 10 mm in diameter and about 0.5 mm in thickness.…”

“…However, the dynamic production behavior of radiation-induced defects under irradiation has not been fully clarified in spite of the considerable progress in understanding many aspects of radiation-induced defects in these ceramic materials. It is thus important to know the production behavior of radiation-induced defects by such an in situ luminescence measurement technique, which may be applied to monitor radiation-induced defects as reported previously [2].…”

“…In our previous study [2], the production behavior of radiation-induced defects in a-alumina and sapphire was studied by in situ luminescence measurement technique under ion beam irradiation of H + and He + . An irradiation history was observed repeatedly with annealed specimens, in which the luminescence intensities increased with irradiation time and reached the steady state ones, and the possibility of using this technique to monitor radiation-induced defects was indicated.…”

“…Following our previous study [2], the irradiation time dependence of the luminescence intensities of the F + and F 0 centers was more extensively measured in the temperature range from 298 to 523 K in the present study. The measurement was made at the lower temperatures to decrease such effects as of thermal quenching.…”

Study on damage process and hydrogen effect in Li2ZrO3 by using ion-induced luminescence

“…Ion-induced luminescence measurements have been carried out to probe the defects and the impurities in ceramic materials [6,7]. In the case of solid breeding materials, the production behavior of irradiation defects has been discussed by in-situ measurements of the ion-induced luminescence in lithium-containing ceramics [8][9][10]. Simultaneous measurements of luminescence and tritium release have been carried out in order to investigate the influence of radiation defects on tritium recovery in Li 2 O [11].…”