The elastic scattering of deuterons from ${\mathrm{He}}^3$ and ${\mathrm{H}}^3$ has been studied for bombarding energies up to 11 MeV. The excitation curves obtained show a broad resonance in the scattering cross section corresponding to an excitation energy of 20±0.5 MeV in both ${\mathrm{He}}^5$ and ${\mathrm{Li}}^5$. These data, together with ${\mathrm{H}}^3(d, n){\mathrm{He}}^4$ and ${\mathrm{He}}^3(d, p){\mathrm{He}}^4$ data from other sources, tend to indicate that $D$ waves are responsible for the anomaly.

• Received 10 October 1966

DOI:https://doi.org/10.1103/PhysRev.154.935