A W Joshi
Articles written in Pramana – Journal of Physics
Volume 10 Issue 5 May 1978 pp 487-495 Solids
Effect of pressure on F-band energies in alkali halides
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.
Volume 15 Issue 5 November 1980 pp 407-412 Molecular Physics
Effective potential for water vapour
A suitable temperature dependence is introduced into the force parameters of the Lennard-Jones potential by taking the free-energy average of the Rowlinson potential. The resulting temperature-dependent parameters are used to calculate the effective potential, which is plotted for water vapour at a few different temperatures. The temperature-dependence of the second virial coefficient is shown for the cases of temperature-independent and temperature-dependent parameters of which the latter agrees very well with experimental results.
Volume 16 Issue 6 June 1981 pp 481-485 Atomic And Molecular Physics
Effective potential for ammonia vapour
Pankaj Pathak Om Singh A W Joshi
The modified free-energy averaged potential for water vapour is extended to NH3 vapour. The resulting temperature-dependent parameters are used to compute the second virial coefficient of NH3 vapour which agrees with experimental results particularly at higher temperatures.
Volume 97, 2023
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