Thermoluminescence studies on single crystal, polycrystalline and glass lithium tetraborate samples irradiated by X-rays from Indus-2

Undoped, Mn doped and Cu doped samples of lithium tetraborate (LTB) were prepared in single crystal, polycrystalline and glass forms. These samples were investigated for their thermoluminescence (TL) response on irradiation by X-rays from Indus-2 synchrotron radiation source. Two well separated peaks were observed in TL glow curves for the doped single crystal and polycrystalline samples; however, glass samples show only one peak. Activation energy, frequency factor and order of kinetics were determined from the TL glow curve. Cu doped LTB crystal sample was found most TL sensitive whereas undoped LTB glass gives the least TL counts. Compared to doped samples, the undoped LTB glass sample was found suitable for high dose measurement immediately after irradiation.