Growth and emission properties of Sc, Pr, and Ce co-doped Lu3Al5O12 epitaxial layers for scintillators

✍ Scribed by M. Kučera; M. Nikl; P. Průša; J.A. Mareš; K. Nitsch; M. Hanuš; Z. Onderišinová; R. Kučerková

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 470 KB
• Volume: 318
• Category: Article
• ISSN: 0022-0248
• DOI: 10.1016/j.jcrysgro.2010.11.140

✦ Synopsis

The effect of Sc, Pr, and Ce co-doping on the emission and scintillation properties of lutetium aluminum epitaxial garnet layers, Lu 3 Al 5 O 12 (LuAG), was studied. The Sc and Pr co-doped garnets with optimized dopant content provide in many aspects better emission and scintillation response compared to those without Sc co-doping. Energy transfer from sensitizer Sc 3 + to activator Pr 3 + ions was observed for small Sc doping levels, which consequently resulted in increased radioluminescence intensity and photoelectron yield. At higher Sc content above 3 at%, however, the Pr 3 + emission was partly quenched. Considerable suppression of slow components and notable increase of fast components in the photoelectron yield was the most remarkable effect of the Sc co-doping in PrSc:LuAG.