The present report is devoted to growth of bulk crystals and fibers by Czochralski (Cz) and micro-pulling down (µ-PD) methods. LGSO:Ce fibers by µ-PD were obtained for the first time. µ-PD is an efficient method for prompt screening of crystal compositions. Besides this, fibers are promising for utilization in pixelated detectors without multistage procedure of crystal machining. Optimal ratio of substituted cations and activator concentration in LGSO:Ce was determined by Cz and µ-PD. Relative population of Lu³⁺ and Gd³⁺ in 7-fold and 6-fold cation positions not differs substantially in crystals grown by different methods. luminescence spectrum of LGSO:Ce consists of subbands associated with CeO₇ and CeO₆ polyhedra. Similar shapes of luminescence spectra of Cz and µ-PD grown crystals certifies no substantial difference in activator distribution between these sites.

The work is partially supported by the project No. 28317ZC in the framework of DNIPRO scientific collaboration between Ukraine and France.

corresponding author e-mail: [email protected]

References
1. M. Fasoli, A.Vedda, M. Nikl et al. Phys. Rev., B 84, 081102(R) (2011).
2. O. Sidletskiy, A. Belsky, A. Gektin et al., Crystal Growth & Design 12, 4411 (2012).

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