Continuous Growth of Large Halide Scintillation Crystals

Continuous Growth of Large Halide Scintillation Crystals 

Alexander Cektin, Valentine Coriletskiy and Borys Zaslavskiy 14.1 

Crystal Growth Technology. Edited by Hans J. Scheel and Peter Capper Copyright 2008 WILEY-VCH Verlag GmbH Co. KGaA, Weinheim ISBN 978-3-527-31762-2 

The methods of seed-crystal pulling from the melt (the Kyropoulos and Czochral-ski techniques) have a number of inherent merits as compared to the normal crystallization in a crucible. First, there is the possibility of rotation of the crystal pulled that provides for intensive mixing of the melt before the crystaUization front Secondly, there are no problems associated with crystal adhesion. But, at the same time, these methods are very sophisticated from the technical standpoint 

In all cases, the development of a stable crystal-growth technique was dependent on the ways of empirical selection of the crystallization conditions. The yield of perfect crystals was not high, since the optimum activator concentration was achieved in the middle zone of the ingot only. 

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I 74 Continuous Growth of Large Halide Scintillation Crystals... 

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