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HK: Fachverband Physik der Hadronen und Kerne

HK 63: Structure and Dynamics of Nuclei 12

HK 63.1: Group Report

Thursday, March 26, 2015, 17:00–17:30, P/H2

Decay properties of the Pygmy Dipole Resonance — •J. Isaak1,2, T. Aumann3,4, T. Beck3, N. Cooper5, V. Derya6, U. Gayer3, J. Kelley7,8, B. Löher3,4, N. Pietralla3, C. Romig3, D. Savran1,2, M. Scheck9,10, H. Scheit3, J. Silva1,2, W. Tornow7, H. Weller7, V. Werner3, A. Zilges6, and M. Zweidinger31EMMI, Darmstadt — 2FIAS, Frankfurt — 3IKP, TU Darmstadt — 4GSI, Darmstadt — 5WNSL, Yale University, New Haven, USA — 6IKP, Universität zu Köln — 7Department of Physics, Duke University, TUNL, USA — 8Department of Physics, NCSU, USA — 9School of Engineering, UWS, Paisley, UK — 10SUPA, Glasgow, UK

The so-called Pygmy Dipole Resonance (PDR) has been investigated in stable and in a few unstable nuclei in the past decades. So far, decay properties have been determined only in an indirect or model-dependent way. An excellent tool to extend the study of the decay pattern of the PDR is provided by the γ3-setup [1] at the High Intensity γ-ray Source (HIγS). The combination of the γ-γ-coincidence method and the quasi-monochromatic photon beam at HIγS allows to observe primary transitions directly with high sensitivity and to obtain information on the decay behavior of individual states as well as extracting averaged quantities in a model-independent way. Recent experimental results for nuclei in the Z=50 and N=82 mass region will be presented.
B. Löher et al., NIM A 723 (2013) 136.
* Supported by the Alliance Program of the Helmholtz Association (HA216/EMMI), DFG (SFB 634 and ZI 510/4-2).

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