The Coulomb scattering and Coulomb distortions are included in the optimal expansion technique in the $cos\theta$ plane. From $p$-${}_{}{}^3{}_{}{}^{}\mathrm{He}$ elastic scattering from 4-20 MeV, an energy independent spectroscopic factor for ${}_{}{}^3{}_{}{}^{}\mathrm{H}_e^{}{}_{}{}^{}\to p+d$ is found, with an accuracy of a few percent. The method seems most promising for transfer reactions.

NUCLEAR REACTIONS Dispersion relations, Coulomb corrections for $cos\theta$ analyticity.

• Received 7 April 1975

DOI:https://doi.org/10.1103/PhysRevC.12.36