The Amado model of three-body reactions is applied to investigate the $D$-phase anomalies observed in the $p-{}_{}{}^3{}_{}{}^{}\mathrm{H}$ scattering experiment for proton energies below 12 MeV. A perturbation calculation using $s$-wave separable potentials and including the spin-isospin dependence of the interacting particles demonstrates that the coupling of the $p+{}_{}{}^3{}_{}{}^{}\mathrm{H}$ channel to the $d+d$ and other breakup channels is important only in the singlet $D$ state. The calculated inelasticity parameter ${\eta }_{20}^2$ is found to be in good agreement with experiment.

NUCLEAR REACTIONS ${}_{}{}^3{}_{}{}^{}\mathrm{H}\mathrm{}(p,p)\mathrm{}$, $E=4\mathrm{}-12$ MeV; calculated ${\eta }_{20}^2$. Amado model of three-body reactions.

• Received 18 April 1977

DOI:https://doi.org/10.1103/PhysRevC.16.1757