RDDS lifetime measurements of yrast states in 186Hg

by Mr Matthias Hackstein (Institut für Kernphysik, Universität zu Köln)

Monday 1 Aug 2011, 11:00 → 12:00 Europe/Rome

LAE meeting room (INFN-LNL)

In light, even-mass Hg isotopes, a weakly deformed oblate ground state band is found to coexist with a more deformed prolate band. To investigate the nuclear structure in more detail a recoil-distance Dopplershift (RDDS) experiment has been performed to determine absolute transition strengths in 186Hg. These transition strengths provide information on the level mixing amplitudes of the two involved collective excitations. The experiment was carried out using the GAMMASPHERE HPGe-Array at the Argonne National Laboratory and the Cologne coincidence Plunger, equipped with a Ta-backed 150Sm target and a gold stopper foil. The beam was 40Ar at 184 MeV. We will present first results of the experiment. Supported by DFG, DE 1516/1-1