Münster 2011 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 57: Struktur und Dynamik von Kernen IX
HK 57.2: Vortrag
Donnerstag, 24. März 2011, 16:45–17:00, O-1
Lifetime and g-factor measurments of excited nuclear states in 86Kr and unstable neutron-rich 90Sr — •Philipp John1, Andrea Jungclaus2, Jörg Leske1, Riccardo Orlandi2, Norbert Pietralla1, Michael Reese1, Christian Stahl1, Ivan Kojouharov3, Henning Schaffner3, and Hans-Jürgen Wollersheim3 — 1IKP, TU Darmstadt, Germany — 2CSIC Madrid, Spain — 3GSI Darmstadt, Germany
The isotopes 88−96Sr and 90−98Zr form the region of lowest collectivity between 56Ni and 204−210Pb with a unique behaviour of their B(E2) values. The nuclear structure of the lowest excited states is strongly influenced by neutron and proton subshell closures between N = 50 and N = 82 which tend to stabilize spherical configurations. The nucleus 90Sr is also interesting for the investigation of states with mixed proton-neutron symmetry. In the campaign U246 at the UNILAC (GSI) lifetimes and g factors of excited nuclear states in 86Kr and 90Sr have been measured using the Transient Field technique and DSAM after population of the states in a Coulex (86Kr) and α-transfer (90Sr) reaction. Results will be presented and discussed within different nuclear models. *supported by BMBF