München 2019 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 36: Structure and Dynamics of Nuclei VI

HK 36.6: Talk

Wednesday, March 20, 2019, 15:30–15:45, HS 14

Studying the Pygmy Dipole Resonance in ⁹⁰Zr in a (p,p’γ) experiment — •M. Steffan, A. Bohn, V. Everwyn, M. Färber, F. Kluwig, M. Müscher, S. G. Pickstone, S. Prill, P. Scholz, M. Weinert, J. Wilhelmy, and A. Zilges — University of Cologne, Institute for Nuclear Physics, Germany

This talk will present experimental data of a proton scattering experiment on ⁹⁰Zr which was performed at the combined setup SONIC@HORUS in the energy region of the Pygmy Dipole Resonance [1]. The 10MV FN Tandem accelerator delivered a 15 MeV proton beam to the particle-γ coincidence spectrometer. The coincident detection of scattered protons and γ-rays allows the determination of branching ratios and, thus, extends the knowledge on the J^π= 1⁻ states of ⁹⁰Zr previously identified by nuclear resonance fluorescence measurements [2]. For this a comparison to NRF data will be given, including the excitation behavior of both methods. Furthermore, aspects of the experimental procedure and their impact on observations will be discussed.
Supported by DFG (ZI 501/7-1). AB and MS are supported by the Bonn Cologne Graduate School of Physics and Astronomy.
D. Savran, T. Aumann, A. Zilges, Prog. Part. Nucl. Phys. 70 (2013) 210
R. Schwengner et al., Phys. Rev. C 78 (2008) 064314