Abstract
This paper reports thermoluminescence and other optical studies on RbCl:Tb 3+ crystals irradiated with X-rays. Terbium is found to enter the host matrix in its trivalent state. Photoluminescence studies of these crystals exhibit characteristic Tb 3+ emissions due to transitions from the 5D 3 and 5D 4 levels to various levels of the 7F septet. The presence of the characteristic emission due to Terbium ions in the photostimulation at the F band confirms the participation of Tb ions in the defect production process and in the thermoluminescence process. Thermoluminescence emission spectra exhibit the characteristic emissions of Tb 3+ in addition to the recombination of the F electron with V-type centres. An energy level diagram is developed to indicate the recombination processes.
Published Version
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