Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 26: Structure and Dynamics of Nuclei 6
HK 26.5: Vortrag
Dienstag, 24. März 2015, 15:45–16:00, T/SR14
Relativistic Coulomb Excitation of 88Kr — •Kevin Moschner, Andrey Blazhev, Jan Jolie, Nigel Warr, and Andreas Wendt for the PreSPEC collaboration — IKP, Universität zu Köln, 50937 Köln
Within the scope of the PreSPEC campaign we performed a Coulomb-excitation experiment to determine absolute E2 transition strengths to 2+ states in the radioactive nucleus 88Kr. The aim of our studies was to identify the one quadruple-phonon mixed-symmetry 2MS+ state in order to extend our knowledge on these states to lighter N=52 isotones and to track their evolution over different proton shells.
The investigated ions were provided through projectile fission of a 650 MeV 238U beam on a primary target consisting of 0.6 g/cm2 9Be and subsequent separation and identification of the reaction products via the FRS at GSI. The secondary target consisted of 0.4 g/cm2 197Au. De-exciting γ radiation was detected by the PreSPEC array, consisting of 15 EUROBALL Cluster detectors. The Lund-York-Cologne-CAlorimeter LYCCA was used for particle identification after the secondary target.
Absolute transition strengths of the transitions depopulating the 23+ state in 88Kr which suggest the mixed symmetric character of this state will be presented and discussed within the systematics of the N= 52 isotones.
Supported by the German BMBF under grant 05P12PKFNE.