Decay pattern of the Pygmy Dipole Resonance in ¹³⁰Te

¹ ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, Darmstadt, Germany
² Frankfurt Institute for Advanced Studies FIAS, Ruth-Moufang-Str. 1, Frankfurt, Germany
³ Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstr. 9, Darmstadt, Germany
⁴ Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, Prague 8, Czech Republic
⁵ Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
⁶ School of Engineering, University of the West of Scotland, Paisley PA1 2BE, UK
⁷ SUPA, Scottish Universities Physics Alliance, Glasgow G12 8QQ, UK
⁸ Institut für Angewandte Physik, Goethe-Universität Frankfurt, Max-von-Laue-Str. 1, Frankfurt, Germany
⁹ Physics Division, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550
¹⁰ Department of Physics, Duke University, Durham, North Carolina 27708-0308, USA
¹¹ Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA

^a e-mail: j.isaak@gsi.de

Published online: 20 March 2014

Abstract

The electric dipole strength distribution in ¹³⁰Te has been investigated using the method of Nuclear Resonance Fluorescence. The experiments were performed at the Darmstadt High Intensity Photon Setup using bremsstrahlung as photon source and at the High Intensity $\overrightarrow{\gamma }$-Ray Source, where quasi-monochromatic and polarized photon beams are provided. Average decay properties of ¹³⁰Te below the neutron separation energy are determined. Comparing the experimental data to the predictions of the statistical model indicate, that nuclear structure effects play an important role even at sufficiently high excitation energies. Preliminary results will be presented.