München 2019 – wissenschaftliches Programm
HK 36.3: Vortrag
Mittwoch, 20. März 2019, 14:45–15:00, HS 14
Dipole strength of 164Dy below the neutron separation threshold — •O. Papst1, V. Werner1, 2, N. Pietralla1, T. Beck1, J. Beller1, C. Bernards2, M. Bhike3, 4, N. Cooper2, 5, B. P. Crider6, 7, 8, U. Gayer1, J. Isaak1, J. Kleemann1, FNU Krishichayan3, 4, B. Löher1, F. Naqvi2, 7, E. E. Peters6, F. M. Prados-Estevez6, R. S. Ilieva9, T. J. Ross4, D. Savran10, M. Scheck1, 11, 12, W. Tornow3, 4, J. R. Vanhoy5, 13, S. W. Yates5, and M. Zweidinger1 — 1IKP, TU Darmstadt — 2WNSL, Yale University, New Haven, CT, USA — 3TUNL, Durham, NC, USA — 4Duke University, Durham, NC, USA — 5UND, Notre Dame, IN, USA — 6UKY, Lexington, KY, USA — 7MSU, East Lansing, MI, USA — 8MSU, Starkville, MS, USA — 9UNIS, Guildford, UK — 10GSI, Darmstadt — 11UWS, Paisley, UK — 12SUPA, Glasgow, UK — 13USNA, Annapolis, MD, USA
Low-lying E1 strength in heavy nuclei is frequently addressed as a Pygmy Dipole Resonance and associated to a semi-collective neutron-skin oscillation. It can be expected to be sensitive to the nucleus’ symmetry axes, separating into two parts for axially deformed nuclei (K-splitting). Data are sparse for such nuclei. In nuclear resonance fluorescence experiments conducted at the γ3 setup at the High Intensity γ-ray Source (HIγS), the dipole strength above 4 MeV of the deformed nucleus 164Dy was studied using a polarized, quasi-monochromatic γ-ray beam, such that E1 and M1 strengths can be discussed. Resulting average quantities are compared to statistical model calculations.
* Supported by the DFG, Collaborative Research Center 1245.