中田 仁

Low-lying electromagnetic transitions have been studied by the method of nuclear resonance fluorescence (NRF) or nuclear photon scattering. Quasi-monochromatic linearly polarized photon beams from inverse Compton scattering of laser light are used to excite nuclei around shell closure. In this report, the results of NRF measurements on 208Pb are presented. The magnetic dipole resonance below the neutron separation energy is resolved in to several individual transitions. The experimental results are compared with theoretical predictions based on self-consistent RPA calculations. A role of the tensor force is discussed.