Scintillation and spectroscopic properties of Ce3+-doped YAlO3 and Lu-x(RE)(1-x)AlO3(RE = Y3+ and Gd3+) scintillators

摘要

Scintillation properties like photoelectron yield and light yield of Ce3+-doped YAlO3 and mixed Lu-x(RE)(1-x)AlO3 (RE = Y3+ and Gd3+) perovskite crystals are presented. The photoelectron yields increase almost linearly with gamma-ray energy but a small non-linearity is observed around 40 keV. Scintillation and spectroscopic properties like UV or X-ray excited emission, laser excited emission, excitation and absorption spectra and photo- and scintillation decay of the different crystals are compared. The influence of intrinsic absorption and reflecting tape on the yields are discussed. Selected YAlO3:Ce showed the highest light yield of 25,000 phels/MeV and an energy resolution of 4.5 % for 662 keV gamma-radiation. The gamma-ray linear absorption coefficient increases with Lu content and that of LuAlO3:Ce is almost 10 times higher than that of YAlO3:Ce. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 36]