Heidelberg 2015 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 63: Structure and Dynamics of Nuclei 12

HK 63.6: Vortrag

Donnerstag, 26. März 2015, 18:30–18:45, P/H2

The Dipole Response of ¹³²Sn — •Philipp Schrock¹, Thomas Aumann¹, Konstanze Boretzky², Jacob Johansen¹, Dominic Rossi³, and Fabia Schindler¹ for the R3B collaboration — ¹IKP, TU Darmstadt — ²GSI Helmholtzzentrum — ³Michigan State University

The Isovector Giant Dipole Resonance (IVGDR) is a well-known collective excitation in which all protons oscillate against all neutrons of a nucleus. In neutron-rich nuclei an additional low-lying dipole excitation occurs, often denoted as Pygmy Dipole Resonance (PDR).

To study the PDR in exotic Sn-isotopes, an experiment has been successfully performed with the upgraded R³B-LAND setup at GSI. The complete-kinematics measurement of all reaction participants allows for the reconstuction of the excitation energy and, hence, the extraction of the dipole strength. Presented are the main features of the experiment, the analysis concept and the current status of the analysis of the dipole response of the doubly-magic isotope ¹³²Sn.

This work is supported by HIC for FAIR, GSI-TU Darmstadt cooperation, Navi and the BMBF project 05P12RDFN8.