Luminescence of Cr-doped alumina induced by charged particle irradiation

Inoue, Aichi; Nagata, Shinji*; To, Kentaro*; Tsuchiya, Bun*; Yamamoto, Shunya; Shikama, Tatsuo*

The ion-induced luminescence behavior has been investigated for Cr-doped alumina (ruby, -AlO: 0.5 wt% Cr) under MeV region H and He ion irradiation. The initial yield of the R-line luminescence (693 nm) increased proportionally to the projected range of the incident H ions, indicating that the ion- induced luminescence efficiency for an H ion was constant with independence of the electronic energy loss. However, the He induced luminescence yield was not directly related to either the projected range or the incident energy, corresponding that the efficiency decreased with increasing the electronic energy loss. The reduction of R-line yields by the ion irradiation was adequately explained by decreasing R-line luminescence centers.