Collision of Neutron and Proton. II

Abstract

A neutron-proton potential field of the form discussed in an earlier paper has been chosen, of radius ${r}_{0}=2.7\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}13}$ cm, with a triplet depth of 36.04 Mev, corresponding to a binding energy of 2.2 Mev for the deuteron. Two different singlet depths are used, 14.64 Mev and 16.36 Mev, corresponding to cross sections for neutron-proton scattering of 12 and 40\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}24}$ ${\mathrm{cm}}^{2}$, respectively, having no stable singlet state. Using these potentials, the elastic and inelastic collision of neutron and proton have been computed for a range of energies of the incoming neutron from 0 to 40 Mev. The angular distribution of elastic scattering shows decided departure from the spherical symmetry predicted by the use of a "square hole" potential; and is in fair agreement with available experimental data. Agreement is also obtained with experimental data on elastic cross section and capture cross section for fast neutrons. Curves for cross section for deuteron disintegration by gamma-rays are also computed. Experimental confirmation of these will provide a test of the correctness of our choice of form of potential. In all these cases, the results for the two different singlet potentials are practically identical for energies larger than 1 Mev.