Phenomenological Neutron-Proton Potentials

Abstract

Central, tensor, and spin-orbit potentials are calculated for the neutron-proton triplet state. They allow explicit solution of the Schr\"odinger equation and fit the low-energy data: effective range, scattering length, deuteron binding energy, quadrupole moment, and $D$-state probability. The deuteron wave function as well as scattering wave functions which result from these potentials are also computed. The potential and wave functions which fit the low-energy singlet state data are also obtained.