pp. 1547-1554
S&M1610 Research Paper of Special Issue https://doi.org/10.18494/SAM.2018.1919 Published: July 27, 2018 Characterizations of Ce-doped Y4Al2O9 Crystals for Scintillator Applications [PDF] Go Okada, Masaki Akatsuka, Hiromi Kimura, Masaki Mori, Naoki Kawano, Noriaki Kawaguchi, and Takayuki Yanagida (Received December 19, 2017; Accepted April 11, 2018) Keywords: scintillator, Y4Al2O9, YAM, Ce3+
Ce-doped Y4Al2O9 (YAM) crystals were grown by the floating zone method, and several different characterizations were conducted for scintillator applications. Both photoluminescence (PL) and scintillation show emissions predominantly due to the 5d–4f transitions of Ce3+ over 400–600 nm. The luminescence lifetime is approximately 10 ns for PL while the scintillation decay curve is best fitted by a second-order exponential decay function with the lifetimes of approximately 30 and 300 ns. These lifetimes are faster than that for Ce:Y3Al5O12 (YAG) (~120 ns) and close to that of Ce:YAlO3 (YAP) (~30 ns). The Ce-doped YAM shows a relatively high afterglow signal induced by X-rays (2 ms pulse) possibly due to the inclusion of a large number of defect centers. Pulse height spectroscopy was demonstrated under alpha-ray irradiation, and a successful sample showed a full-energy peak.
Corresponding author: Go OkadaCite this article Go Okada, Masaki Akatsuka, Hiromi Kimura, Masaki Mori, Naoki Kawano, Noriaki Kawaguchi, and Takayuki Yanagida, Characterizations of Ce-doped Y4Al2O9 Crystals for Scintillator Applications, Sens. Mater., Vol. 30, No. 7, 2018, p. 1547-1554. |