Heidelberg 2015 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 63: Structure and Dynamics of Nuclei 12
HK 63.2: Vortrag
Donnerstag, 26. März 2015, 17:30–17:45, P/H2
Selective excitation of the Pygmy Dipole Resonance in 120Sn via the (d,pγ)-reaction — •Michael Weinert, Vera Derya, Andreas Hennig, Simon G. Pickstone, Mark Spieker, Julius Wilhelmy, and Andreas Zilges — Institute for Nuclear Physics, University of Cologne
The excitation of states belonging to the Pygmy Dipole Resonance (PDR) by a single-neutron transfer-reaction was investigated in 120Sn, using a 119Sn(d,pγ)-experiment and the combined setup SONIC@HORUS at the 10 MV Tandem accelerator in Cologne. The setup consisting of 14 HPGe and 6 ΔE-E silicon telescope detectors for the coincident detection of γ-rays and charged particles, respectively, enables an offline selection of excitation and deexcitation channels. First results show that dipole states in the PDR region, i.e. 5 MeV to 9 MeV, could be excited by the reaction. These dipole states were identified as PDR states by comparison with data from a Nuclear Resonance Fluorescence experiment [1]. The contribution will present the experiment and principles of the data analysis needed to select transitions from or to Jπ=1− states. Using results from the experiment, features of the PDR will be discussed, including possible particle-hole configurations. Supported by the DFG (ZI 510/4-2).
[1] B. Özel et al., Phys. Rev. C 90 (2014) 024304