Non-proportionality and thermoluminescence of LSO:Ce

This work presents the results from experiments performed on Lu₂SiO₅:Ce (LSO:Ce). It looks for potential correlations of light yield non-proportionality and other scintillation properties including intrinsic energy resolution with thermoluminescence properties. Samples were chosen from various crystal batches that were known to have significantly different properties. Single crystal LSO:Ce samples were coupled to an XP2020Q photomultiplier and to large area avalanche photodiodes and measured as a function of gamma-ray energy between 14.7 and 1770 keV at room temperature and also near liquid nitrogen temperature. In order to explain the experimental results obtained from spectrometric methods, the properties of the samples were further studied using thermoluminescence techniques within the temperature range from 250 to 600 K. The relationships between data obtained from these two types of experiments are reported.