Journal of Crystal Growth, Vol.318, No.1, 545-548, 2011
Scintillation properties of Sc-, Pr-, and Ce-doped LuAG epitaxial garnet films
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 alpha-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. (C) 2010 Elsevier B.V. All rights reserved.
Keywords:Energy resolution;Photoelectron yield;Liquid phase epitaxy;LuAG:Pr;Sc codoped material;Scintillator materials