Off-Energy-Shellt-Matrix Elements for Local Potentials Containing Hard Cores

A method is presented for calculating the off-energy-shell two-body reaction matrix elements for a local potential that contains a hard core. An analytic expression is presented for the matrix elements, $t(k^{\prime }, k; s)$, for the special case of a hard-core potential with no other interaction. Graphs are presented showing the effects of the hard core for negative values of the energy parameter $s$ and $l=0\mathrm{}$ relative-angular-momentum states, using a potential of exponential shape and parameters chosen to approximate the nucleon-nucleon interaction.