Evaluation Of kinetic parameters Of Li2b4o7:Mn single crystal

Abstract

The kinetic parameters of a newly developed Li2B4O7:Mn single crystal phosphor have been presented. Li2B4O7 single crystal doped with Mn were grown via the Czochralski method. Thermoluminescence (TL) glow curve of Li2B4O7:Mn single crystal exhibits two well separated TL peaks at about 363 and 478K, later being more intense, with a heating rate of 1K/s. The high-temperature glow curve at 478K is important for dosimetric studies of Li2B4O7 (LBO) doped with Mn. The kinetic parameters (activation energy (E), frequency factor (s) and kinetic order (b)) of the main glow peak (478K) have been calculated using initial rise (IR), isothermal decay (ID) and peak shape (PS) methods. Activation energies obtained by IR, ID and PS were found to be 1.24, 1.18 and 1.20eV, respectively. Similarly, the frequency factors were determined using isothermal decay and peak shape methods and found as 7.85×1011 and 3.27×1011s−1, respectively. All results obtained using these methods are compared and discussed.