Abstract

MOROYOQUI-ESTRELLA, G.; PEREZ-SALAS, R.  and  RODRIGUEZ-MIJANGOS, R.. A generalized rule of average for glow peak temperature of ternary alkali halide systems. Rev. mex. fis. [online]. 2011, vol.57, n.2, pp.154-157. ISSN 0035-001X.

The anion composition dependence of the characteristic glow peak temperature of europium doped KCl_0.50KBr_0.25RbX_0.25:Eu²⁺ (X=Cl, Br) mixed crystals are studied. Each material shows a thermoluminescence glow curve consisting of two main glow peaks with a temperature is between KCl:Eu²⁺ and KBr:Eu²⁺. The most intense is related to the F center destruction as occur in the case of KCl:Eu²⁺ crystals and its characteristic temperature depends strongly on the halogen composition. This behavior confirms that the temperature of the F-H centers recombination in this type of materials depends more on the proportion of anions. From these results, a generalized rule to obtain the temperature from averaging the characteristic temperature as function of the composition is discussed.

Keywords : Defects in solids; ternary solid solutions; thermoluminescence; color centers.