Scintillation properties of Yb3+-doped YAG transparent ceramics

► This report is first study of scintillation properties of Yb:YAG transparent. ► The ceramics showed more than 70% transparency in visible wavelength range. ► Yb3+ charge transfer luminescences were observed around 350 and 480nm. ► The fast decay time found to be about 1–2ns for the Yb:YAG ceramics...

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Veröffentlicht in:Optical materials 2013-02, Vol.35 (4), p.778-781
Hauptverfasser: Fujimoto, Yutaka, Yanagida, Takayuki, Wakahara, Shingo, Yagi, Hideki, Yanagidani, Takagimi, Kurosawa, Shunsuke, Yoshikawa, Akira
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Sprache:eng
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Zusammenfassung:► This report is first study of scintillation properties of Yb:YAG transparent. ► The ceramics showed more than 70% transparency in visible wavelength range. ► Yb3+ charge transfer luminescences were observed around 350 and 480nm. ► The fast decay time found to be about 1–2ns for the Yb:YAG ceramics. We investigated scintillation properties of Yb3+-doped Y3A5O12 (YAG) transparent ceramics with different dopant concentrations. The transparency of both 0.3% and 15% Yb3+-doped exceeded 70% in the wavelength range 300–800nm, and two kinds of absorption bands due to charge transfer (CT) transition and 4f–4f forbidden transition of Yb3+ were observed around 200–250nm and 900nm, respectively. Ultraviolet luminescence caused by the CT transition between Yb3+ and O2− was observed under α-ray excitation from 241Am sealed source. The scintillation decay times were determined to be about 2.2ns (Yb 0.3%) and 1.4ns (Yb 15%) using the streak camera system equipped with pulsed X-ray source. From 241Am alpha-ray-excited pulse height spectra, the relative scintillation light yield of 0.3% and 15% Yb3+-doped ceramics was 7% and 10% compared with that of BGO commercial scintillator.
ISSN:0925-3467
1873-1252
DOI:10.1016/j.optmat.2012.06.008