Scintillation properties of Sc-, Pr-, and Ce-doped LuAG epitaxial garnet films

✍ Scribed by P. Prusa; M. Kucera; J.A. Mares; M. Nikl; K. Nitsch; M. Hanus; Z. Onderisinova; T. Cechak

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 417 KB
• Volume: 318
• Category: Article
• ISSN: 0022-0248
• DOI: 10.1016/j.jcrysgro.2010.10.046

✦ Synopsis

Lu 3 Al 5 O 12 (LuAG) films were grown from the BaO-B 2 O 3 -BaF 2 flux on LuAG and YAG substrates using the liquid phase epitaxy method (LPE). They were doped with Pr 3 + , Sc 3 + , and eventually still with Ce 3 + ions.

Photoelectron yield, its time dependence, and energy resolution were measured under a-particle excitation. A sample of the Czochralski-grown bulk LuAG:Pr single crystal was measured as a reference. The best performing epitaxial films had low Sc 3 + concentration and appeared comparable or superior to the Czochralski-grown crystal in terms of photoelectron yield and relative intensity of the fast component of scintillation response. High concentration of Sc 3 + ions results in slowdown of response and lower photoelectron yield. Some samples with lower photoelectron yield than that of the Czochralski-grown crystal did exhibit better energy resolution.