The phenomenological Hamada-Johnston nucleon-nucleon potential is modified by replacing the singular hard core with a soft core of the centrifugal type ($r^{-2\mathrm{}}$). It is shown that the fits to experimentally determined elastic scattering phase shifts and deuteron data are little affected by such a modification.

• Received 26 February 1968

DOI:https://doi.org/10.1103/PhysRev.172.1013