• S S Mehdi

      Articles written in Pramana – Journal of Physics

    • Coulomb energy of3He and charge-symmetry breaking in nuclear forces

      S S Mehdi V K Gupta

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      We report a calculation of Coulomb energy of3He with two-term separable potentials of a form proposed recently, and a perturbative calculation of the charge-symmetry-breaking potential, again in a two-term separable form. By using potential sets adjusted to various values of proton-neutron effective range difference, some limit is sought to be placed on this quantity, about which nothing is known experimentally.

    • Electromagnetic form factors of3He and3H

      S S Mehdi V K Gupta

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      The electric and magnetic form factors of3He and3H are calculated with 3-nucleon wave functions obtained from the solution of Schrödinger equation with separable potentials of two different shapes which have already been employed in the coulomb energy calculation. The effect of important meson exchange corrections is evaluated and their dependence on the wave function studied. The form factors can depend rather sensitively on the nucleon form factors as well, and this dependence is studied by using two different parametrisations for the latter.

    • Deuteron form factors and the tensor force

      S S Mehdi V K Gupta

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      Results of a non-relativistic calculation of deuteron form factors are presented for separable potentials with and without tensor force. The tensor term in triplet state is added in such a way as to keep the values of deuteron binding energy,at andr0t unaltered, so that the difference in the form factors can be regarded as the effect of tensor force only. The calculation has been performed for two different shapes of separable potentials and for three differentD-state probabilities to study their comparative effect.

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