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Light output and energy resolution for a 2×2×10 mm3 LuYAP:Ce crystal coupled to a XP2020Q photomultiplier were studied. The measured light output of 8530 photons/MeV includes the correction for the quantum efficiency of the XP2020Q photomultiplier. An energy resolution of 7.33% was obtained for 662 keV γ-rays with a long face coupled to the PMT. The measured number of 2130 phe/MeV implies a photoelectron statistical contribution of 6.59% and hence a LuYAP intrinsic energy resolution of 3.21%. The relative light output of the LuYAP scintillator measured for photon energies varying from 31 keV to 1.333 MeV was constant within 7%. These observations are consistent with results for the YAP:Ce scintillator, and with the assumption that there is a direct correlation between the energy resolution of scintillators and non-proportionality of their light output versus energy in the low-energy domain. The results are compared to the relative light output of the LSO:Ce scintillator measured for varying energies. [Copyright &y& Elsevier]

In this paper we present results of light yield, light pulse shape and low-temperature thermoluminescence (ltTL) measurements of Lu0.8Y0.2AlO3:Ce (0.4 and 0.55%) crystals. The light output was measured as between 1510±50 and 2190±70 phe/MeV and energy resolution at 662 keV ranged over 10–21% FWHM. Light pulse shapes consisted of two decay components, 20.0±1 ns (65%) and about 160 ns (35%). Performed ltTL measurements revealed three major peaks at 109, 160 and 195 K. A correlation between 109 and 160 K peaks and low light yield was observed. [Copyright &y& Elsevier]