Second order kinetics thermoluminescence behavior of ky3f10 : ho3+ phosphor

Abstract

The behavior of thermoluminescence glow curve properties of KY3F10 : H3+ o phosphor in view of second order kinetics was studied. Kinetic parameters of the glow curves used to determine the activation energy (E) the initial concentration of filled traps no and frequency factor (s) of the different peaks present in the phosphor. Thermoluminescence measurements with different heating rates, with increasing heating rate, the maximum of a Thermoluminescence glow peak shifts to higher temperatures. At a higher temperature, the luminescence is quenched more intensely so that the whole area under thermoluminescence peak decreases. Thermoluminescence measurements were carried out from 350 to 500 K with varying heating rates in the range of 0.5 to 2 K/s. Two thermoluminescence glow peaks centered at Temperature max = 350 and 500 K were observed at heating rate of β= 0.5 K/s. For low-temperature peak , thermoluminescence intensity decreased whereas that for high-temperature peak increased with elevating the heating rates, which means anomalous heating rate behavior occurred for high-temperature peak.