• S V Moharil

      Articles written in Bulletin of Materials Science

    • Thermoluminescence of alkali halides doped with alkaline earth impurities

      B T Deshmukh S V Moharil

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      Doping with alkaline earth impurities converts the alkali halides into very efficient phosphors. LiF doped with Mg is extensively used in radiation dosimetry. However, the phenomenon of thermoluminescence in these materials is far from clear. LiF-tld 100 is artificially separated from the rest of the alkali halide phosphors. The available experimental data are not fully utilised in building a model for thermoluminescence processes. In this review, thermoluminescence properties of LiF-tld 100 and other alkali halide phosphors are discussed. The comparative study which points out several common points could be useful in understanding thetl processes in these phosphors.

    • Thermoluminescence of alkali halides doped with alkaline earth impurities

      A R Lakshmanan S V Moharil

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    • A review of X-ray imaging phosphors

      S V Moharil

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      The important methods of X-ray imaging use various phosphors. The phosphors give light proportional to the amount of radiation. The light is emitted either as X-ray excited fluorescence, phosphorescence, or due to stimulated, radiative recombinations of defects generated by X-ray exposures. The role of phosphors in improving image quality and reducing exposures to patients is important. Properties of various phosphors which can be used for X-ray imaging applications are reviewed here.

    • Self heat generating synthesis of tri-colour lamp phosphors

      C P Joshi S V Moharil

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      The simple method for the preparation of phosphors such as aluminates, Y2O3, YVO4 and LaPO4 by the combustion synthesis described earlier in the literature is reported. It is shown here that the phosphors prepared by such synthesis do not possess all the required characteristics. Suitable modifications by way of annealing at >1200°C in controlled atmospheres, however, can yield the phosphors with characteristics which may fulfil the demands of lamp industry.

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