Ion Size Effect in Glow Peak Temperature in Binary Mixed Crystals Doped with Divalente Europium
POSTER
Abstract
Thermoluminiscence measurements at room temperature of ``beta'' irradiated divalent Europium doped binary mixed alkali halides with KCl and KBr components at several concentrations x in molar fraction. The experiments have been carried out to identify the effect of composition of glow peaks. A typical glow peak has been distinguished for each composition. A linear dependence of its temperature on the composition x has been found. This is associated with the size change of ions Cl and Br. Initial comparative cathodoluminiscent measurement was carried out irradiating a single sample with electrons in an electron microscopy using a 30 KV voltage. With the present results is speculated the behavior of the mixed binary crystals with components KCl and RbCl, doped with divalent Europium.
*We are grateful for support by CONACYT under proyect 2002-C02-40497 and Direction de Investigacion y Posgrado UNISON under Project ``Catodoluminiscencia por MET."