In elastic scattering between $4N$ nuclei, a rising oscillatory structure often appears in the differential cross section at backward angles. This anomalous phenomenon is explained by an $\alpha$ transfer process between the nuclei. For ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$+${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$ scattering ${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$ is considered to be composed of an ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ core with two alpha particles orbiting around it. These valence particles may be transferred between the cores during the scattering. The nuclear molecular orbital model is applied. A natural agreement with the experimental data can be reached without any adjustment of the parameters involved.

• Received 2 September 1983

DOI:https://doi.org/10.1103/PhysRevC.30.534