The elastic and inelastic scattering of 12.94-MeV protons from ${}_{}{}^{107}{}_{}{}^{}\mathrm{Ag}$ has been studied. Angular distributions have been measured between the angles of 24° and 165° for particles scattered from the ground state and excited states at 0.324, 0.423, 0.780, 0.950, 1.14, 1.28, 1.50, 1.66, and 2.19 MeV. The magnitudes and shapes of the angular distributions are compared with the predictions of the core-excitation model. For the states which appear to be due to coupling of an odd proton to the one-phonon quadrupole and octupole states of the even core, the experimental cross sections are fitted by means of the distorted-wave Born approximation. Differential cross sections of the states attributed to excitation of the one- and two-quadrupole phonon states of the even core have been compared to the predictions of the coupled-channel theory with the assumption that only a $p_{\frac{1}{2}}$ proton is coupled to the core. Reasonable agreement between experiment and theory was obtained, provided an admixture of one- and two-quadrupole phonon $2^{+}$ states was allowed. The knowledge of the derived core-state wave functions is used to evaluate the electromagnetic transition probabilities between some of the states and they are found to be in general accord with those known from Coulomb excitation and $\gamma$-ray experiments.

• Received 2 February 1967

DOI:https://doi.org/10.1103/PhysRev.158.1194