• Nawab Singh

      Articles written in Pramana – Journal of Physics

    • Effect of pressure on F-band energies in alkali halides

      Nawab Singh A W Joshi

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      Variation of peak F-band absorption energy and lattice distortion with pressure has been calculated for lithium halides employing extended ion model and using values of local compressibility in the neighbourhood of the F-centres which include the effect of vacancy and pressure. The calculated results are in very good agreement with experimental results.

    • Extended-ion approximation and pressure shifts inF-band energies

      Nawab Singh AW Joshi

      More Details Abstract Fulltext PDF

      Pressure variation of maximumF-band absorption energies in the halides of lithium, sodium and potassium has been investigated employing the extended-ion approximation for the calculation of theF-electron energy eigenvalues and using values of local compressibility in the neighbourhood of theF-centres which include the effect of vacancy and pressure. The results obtained agree with the experimental results.

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