Seminarium Struktura Jądra Atomowego

Inelastic neutron scattering with accelerator-produced neutrons offers many advantages for studying the structure of nuclei. With monoenergetic neutrons, nuclear levels can be examined near the threshold for their excitation without the attendant complications of feeding from higher-lying states. Although the recoil velocities of the excited nuclei are small, the Doppler-shift attenuation method (DSAM) has been developed to measure nuclear level lifetimes. With these experimental techniques, we have been able to study the structure of a large number of nearly spherical nuclei and to identify collective features, such as mixed-symmetry states and multiphonon excitations of the quadrupole, octupole, and heterogeneous types.