The resonating-group method is used to study the $\alpha$+${}_{}{}^{15}{}_{}{}^{}\mathrm{N}$ system. The result shows that, with the use of a reasonable nucleon-nucleon interaction and a phenomenological imaginary potential, the calculation can yield a differential cross section which agrees rather well with experimental data. In addition, one learns from this study useful information concerning the cluster structures of many bound and resonance levels in the compound nucleus ${}_{}{}^{19}{}_{}{}^{}\mathrm{F}$.

NUCLEAR REACTIONS ${}_{}{}^{15}{}_{}{}^{}\mathrm{N}$($\alpha$,$\alpha$); calculated level structure, phase shifts, and $\sigma \left(\theta \right)$. Resonating-group method.

• Received 6 August 1979

DOI:https://doi.org/10.1103/PhysRevC.20.2003