Bochum 2018 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 40: Structure and Dynamics of Nuclei VIII
HK 40.1: Gruppenbericht
Mittwoch, 28. Februar 2018, 16:30–17:00, HZO 70
Investigation of the dipole response in atomic nuclei in different mass regions in photon scattering experiments — •Julius Wilhelmy1, Johann Isaak2, Bastian Löher3, Miriam Müscher1, Simon G. Pickstone1, Norbert Pietralla4, Deniz Savran3, Philipp Scholz1, Mark Spieker1,5, Werner Tornow6, Volker Werner4, Andreas Zilges1, and Ronald Schwengner7 — 1Institute for Nuclear Physics, University of Cologne — 2RCNP, Osaka — 3GSI, Darmstadt — 4Institute for Nuclear Physics, TU Darmstadt — 5NSCL, Michigan State University — 6Department of Physics, Duke University — 7Helmholtz-Zentrum Dresden Rossendorf
The understanding of different generating mechanisms of electric (E1) and magnetic (M1) dipole excitations in atomic nuclei are of fundamental importance for the description of nuclear matter. Level lifetimes, γ-decay branching ratios and parity quantum numbers of excited J=1 states are extracted from high resolution photon scattering experiments in a model-independent way. Experimental results of complementary measurements with continuous photon flux distributions (at the bremsstrahlung facilities DHIPS [1] and γELBE [2]) and quasi-monoenergetic beams (at HIγS [3]) for nuclei in the A≈50 and A≈140 mass regions will be presented and discussed. First results of the dipole response of 87Rb will be shown.
Supported by the BMBF (05P15PKEN9), JW is supported by the Bonn-Cologne Graduate School of Physics and Astronomy.
K. Sonnabend, D. Savran et al., NIM A 640 (2011) 6-12
R. Schwengner et al., NIM A 555 (2005) 211
B. Löher et al., NIM A 723 (2013) 136