| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1792573 | Journal of Crystal Growth | 2010 | 5 Pages |
In this study, (Gd1−xYx)F3 (x=0.2, 0.4, 0.5 0.6 and 0.8) crystals were grown by the μ-PD method. Neither visible inclusions nor cracks were observed in (Gd1−xYx)F3 (x=0.4, 0.5 and 0.6) crystals. Lattice constants increase linearly as the Y3+ concentration decreases. Using (Gd1−xYx)F3 as a host material, the Sr0.5% Ce1%, 3%, 5% and 7% co-doped Gd0.5Y0.5F3 single crystal was prepared. In this crystal, Ce3+-perturbed luminescence at 380 nm is observed with 31.8 ns photoluminescence decay time. Under X-ray excitation rather high radioluminescence intensity of this band was obtained exceeding that of BGO scintillator. The energy transfer in the sequence of regular Ce3+→ (Gd3+)n→ perturbed Ce3+ sites was evidenced though observation of decay time shortening of the regular Ce3+ and Gd3+ centers and intensity change between Gd3+ and Ce3+-perturbed emission.
