Thermoluminescence kinetic parameters of TLD-600 and TLD-700 after ²⁵²Cf neutron + gamma and ⁹⁰Sr-⁹⁰Y beta radiations

The thermoluminescent (TL) properties such as glow curve structure, relative thermoluminescence sensitivity, dose response linearity of lithium fluoride thermoluminescent dosimeters ⁶LiF : Ti, Mg (TLD-600) and ⁷LiF : Ti, Mg (TLD-700) are investigated after irradiation ²⁵²Cf neutron + gamma and ⁹⁰Sr-⁹⁰Y beta sources at room temperature and then the obtained results are compared. The kinetic parameters, namely the order of kinetics b, activation energy E_a and the frequency factor s, are calculated using the computerized glow curve deconvolution (CGCD) program. The effect of heating rate on the glow curves of dosimeters is also investigated. The maximum TL peak intensities and the total area under the glow curves decrease with the increasing heating rate. There is no agreement with the kinetic parameters calculated by the CGCD program for both radiation sources. (authors)