Kinetics of thermoluminescent calcite

621-626<span style="font-size: 15.0pt;mso-bidi-font-size:8.0pt;font-family:" times="" new="" roman","serif""="">The thermo-stimulated luminescence (TSL) glow curve characteristics of five, blue coloured calcite samples of southern Tamilnadu are put to analysis. NTSL glow peaks are obtained for these samples. The glow curves of annealed (600 °C) and un-annealed samples, irradiated with gamma dose of 500 Gy show three peaks at 145, 255 and 345°C, respectively, recorded with linear heating rate of  10°C/sec. The kinetic parameters such as activation energy <span style="font-size:14.0pt;mso-bidi-font-size:7.0pt; font-family:" arial","sans-serif""="">(E), frequency factor (S) and order of kinetics (b) <span style="font-size:15.0pt;mso-bidi-font-size:8.0pt;font-family: " times="" new="" roman","serif""="">are evaluated, using partial heating, peak shape, isothermal and initial rise methods. The investigations show that, the trapping centres are not affected by the annealing procedure and it follows second-order kinetics. The activation energies have been determined. </span