Author/Authors :
N.R. Krutyak، نويسنده , , V.V. Mikhailin، نويسنده , , A.N. Vasil’ev، نويسنده , , D.A. Spassky، نويسنده , , I.A. Tupitsyna، نويسنده , , ?.M. Dubovik، نويسنده , , E.N. Galashov، نويسنده , , V.N. Shlegel، نويسنده , , A.N. Belsky، نويسنده ,
Abstract :
The process of energy transfer to the emission centers is studied in ZnWO4 and ZnWO4:Mo single crystals in the temperature range 10–300 K. A numerical simulation describing the process is presented; the temperature dependence of energy transfer efficiency to the intrinsic emission centers in ZnWO4 is shown to be defined by the modification of Onsager sphere radius. A competitive role of radiative relaxation channel related to the impurity of molybdenum is studied in ZnWO4:Mo. It is shown that below 60 K the energy transfer to the MoO6 emission centers by free charge carriers terminates due to the self-trapping of holes at WO6 complexes.
Keywords :
Zinc tungstate , Luminescence , energy transfer , Cryogenic scintillator , Onsager sphere
