An approximate amplitude for $n-d$ scattering has been constructed, which depends only on the on-shell two nucleon ${}_{}{}^3{}_{}{}^{}S_1^{}{}_{}{}^{}$ and ${}_{}{}^1{}_{}{}^{}S_0^{}{}_{}{}^{}$ amplitudes and their analytic continuation to negative energies as defined by a separable potential model. The theory has been tested by comparison with exact results, and has been found to be a good approximation for partial waves with $L\ge 2$, and for incident neutron lab energies up to about 14 MeV.

[NUCLEAR REACTIONS $n-d$ scattering; low energies; high partial waves; on-shell theory.]

• Received 28 July 1977

DOI:https://doi.org/10.1103/PhysRevC.17.1