Accessing the Single-Particle Structure of the Pygmy Dipole Resonance in 208Pb

• Published in: Physical review letters Vol. 125; no. 10
• Main Authors: Spieker, M., Heusler, A., Brown, B. A., Faestermann, T., Hertenberger, R., Potel, G., Scheck, M., Tsoneva, N., Weinert, M., Wirth, H. -F., Zilges, A.
• Format: Journal Article
• Language: English
• Published: United States American Physical Society (APS) 02-09-2020
• Subjects: Collective levels; Direct reactions; Nuclear density functional theory; NUCLEAR PHYSICS AND RADIATION PHYSICS; Nuclear reactions; Nuclear structure & decays; Shell model; Spectrometers & spectroscopic techniques; Transfer reactions
• ISSN: 0031-9007; 1079-7114

New experimental data on the neutron single-particle character of the Pygmy Dipole Resonance (PDR) in Pb208 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 Pb208 and establish ( d,p ) as an additional, valuable, experimental probe to study the PDR and its collectivity. Furthermore, 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 Pb208 .