New experimental data on the neutron single-particle character of the Pygmy Dipole Resonance (PDR) in 208Pb are presented. They were obtained from (d,p) and resonant proton scattering experiments performed at the Q3D spectrograph of the Maier-Leibnitz Laboratory in Garching, Germany. The new data are compared to the large suite of complementary, experimental data available for 208Pb and establish (d,p) as an additional, valuable, experimental probe to study the PDR and its collectivity. Besides the single-particle character of the states, different features of the strength distributions are discussed and compared to large-scale shell model (LSSM) and energy-density functional plus quasiparticle-phonon model theoretical approaches to elucidate the microscopic structure of the PDR in 208Pb.
- Pygmy Dipole Resonance
- proton scattering
Spieker, M., Heusler, A., Brown, B. A., Faestermann, T., Hertenberger, R., Potel, G., Scheck, M., Tsoneva, N., Weinert, M., Wirth, H-F., & Zilges, A. (2020). Accessing the single-particle structure of the Pygmy Dipole Resonance in 208Pb. Physical Review Letters, 125(10), . https://doi.org/10.1103/PhysRevLett.125.102503