Published: July 27, 2018
Evaluation of Scintillation and Thermally Stimulated Luminescence Properties of Cs2CdCl4 Single Crystals [PDF]
Takumi Sakai, Masanori Koshimizu, Yutaka Fujimoto, Daisuke Nakauchi, Takayuki Yanagida, and Keisuke Asai
(Received January 5, 2018; Accepted March 27, 2018)
Keywords: thermally stimulated luminescence, s–p transition, Cs2CdCl4
The optical and scintillation properties of undoped, Sb-doped, and Tl-doped Cs2CdCl4 single crystals were investigated. We chose Sb3+ and Tl+ as the dopants of (ns)2-type electronic configurations. In the photoluminescence and scintillation spectra of undoped Cs2CdCl4, three emission peaks were observed. The scintillation decay-time constants were small (1.2 and 13 ns) and light yields were low (several tens of photons/MeV). In contrast, Sb3+- and Tl+-doped Cs2CdCl4 showed s–p transitions of the dopant ions, and the light yield was larger than that of undoped Cs2CdCl4 (625 and 1000 photons/MeV, respectively). Tl-doped Cs2CdCl4 showed relatively large scintillation decay-time constants (270 ns) because of slow energy transfer from the host to Tl+. On the other hand, Sb-doped Cs2CdCl4 showed significant afterglow behavior and three thermally stimulated luminescence (TSL) glow peaks (93, 168, and 238 ℃) with good linearity with respect to the X-ray dose. In conclusion, the light yield of undoped Cs2CdCl4 can be enhanced by doping with Sb3+ and Tl+; TSL characteristics are achieved by doping Sb3+.
Corresponding author: Masanori Koshimizu
Cite this article
Takumi Sakai, Masanori Koshimizu, Yutaka Fujimoto, Daisuke Nakauchi, Takayuki Yanagida, and Keisuke Asai, Evaluation of Scintillation and Thermally Stimulated Luminescence Properties of Cs2CdCl4 Single Crystals, Sens. Mater., Vol. 30, No. 7, 2018, p. 1565-1575.