Highly transparent Ce-doped yttrium orthoaluminate scintillation crystals having various Ce3+ contents (0.3, 0.5 or 1.0at%) were grown by using the Czochralski technique. Growth defects in the crystals were investigated by using the transmission white synchrotron radiation topography method. Growth striations, cores, inclusions, twins and dislocations were found to be the main defects. Instabilities of the growth interface, small facet growth, the purity of the starting materials, anisotropy of the thermal properties and the quality of the seed crystals were suggested to be responsible for generating these defects.

Growth Defects in Czochralski-Grown Ce:YAlO3 Scintillation Crystals. G.J.Zhao, X.H.Zeng, S.M.Zhou, J.Xu, Y.L.Tian, W.X.Huang: Physica Status Solidi A, 2003, 199[2], 186-91