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Münster 2017 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 4: Structure and Dynamics of Nuclei I

HK 4.5: Vortrag

Montag, 27. März 2017, 18:00–18:15, F 2

Soft-dipol excitation in neutron-rich Sn-isotopes — •Joachim Tscheuschner and Thomas Aumann for the DALI-LaBr-RIBF collaboration — TU Darmstadt

To investigate the pygmy-dipole resonance (PDR) in the unstable Sn-128 and Sn-132 isotopes, an alpha-scattering experiment was performed at RIKEN, Japan. The photons of the excited states are measured with a high efficiency detector-array consisting of NaI crystals (DALI2) and in forward-directions large volume LaBr crystals (HECTOR). With alpha-scattering mainly the isoscalar modes are excited, through comparison with Coulomb-excitation it is possible to disentangle the isovector and the isoscalar part of the PDR. The aim of the experiments is to study the the development of the PDR as a function of the neutron-excess. In this contribution the experiments and results of the ingoing analysis are presented. This project is supported by by DFG (SFB1245).

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