In order to check the theory of electric quadrupole Coulomb excitation, accurate measurements have been made of differential cross sections for inelastic scattering from the first excited state of ${\mathrm{Sm}}^{152}$. Protons, deuterons, and alpha particles of energies in the region of 4 Mev were used as the bombarding particles. In addition to the angular distribution of inelastically scattered deuterons, measurements were also made with protons at two scattering angles and at a backward angle with deuterons and alpha particles of different incident energies. The data are found to be in excellent agreement with the semiclassical description of the Coulomb excitation process.

• Received 9 September 1960

DOI:https://doi.org/10.1103/PhysRev.121.841