Thermostimulated luminescence and the temperature dependence of X-ray luminescence of the Li2B4O7 single crystals

Abstract

The LTB:Cu single crystals were grown by the Czochralski method along the [100] direction at the 3 mm/day drawing rate and 4.4 rpm rotation velocity.The initial burden (Li 2 B 4 O 7 ) was synthesized from the pure reactives B 2 O 3 and Li 2 CO 3 (with at least 99.999% basic component content) in the platinum crucible at the air.The single crystals differing by the dopant concentration were produced by sequential growing processes, the burden mass left in the crucible was determined at the beginning of each process and, as a result of calculations, the required CuO amount was added.The copper concentration in the produced single crystals was controlled by means of the photometric and atomic absorption analysis.Using this