The excitation function of the 4.43-MeV gamma ray from the ${\mathrm{Be}}^9(\alpha ,n_1{\gamma }_{4.43}){\mathrm{C}}^{12}$ reaction has been studied and angular distributions have been measured at 13 alpha-particle energies from 3.6 to 7.6 MeV in an effort to determine compound nucleus nature of the ${\mathrm{Be}}^9+\alpha$ system. Many broad resonances are found in the energy region studied.

• Received 17 September 1962

DOI:https://doi.org/10.1103/PhysRev.129.2217