Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 17: Structure and Dynamics of Nuclei 4
HK 17.2: Vortrag
Montag, 23. März 2015, 17:30–17:45, T/SR14
Lifetime measurements of N=Z nuclei 44Ti, 48Cr and 52Fe — •Konrad Arnswald, Michael Seidlitz, Andreas Vogt, Peter Reiter, Benedikt Birkenbach, Andrey Blazhev, Thomas Braunroth, Alfred Dewald, Christoph Fransen, Bo Fu, Andreas Hennig, Rouven Hirsch, Lars Lewandowski, Julia Litzinger, Claus Müller-Gatermann, Dawid Rosiak, Nima Saed-Samii, David Schneiders, Burkhard Siebeck, Tim Steinbach, Kai Wolf, and Karl-Oskar Zell — Institut für Kernphysik, Universität zu Köln
Reduced transition strengths expressed with B(E2) values are good signatures to describe collective excitations of atomic nuclei and are indispensable to understand nuclear shell structures. Along the N=Z line in the pf shell they provide stringent tests of recent shell model interactions, e.g. [1]. So far, B(E2, 21+→ 01+) values for the self-conjugate 2244Ti, 2448Cr, 2652Fe isotopes are known only with considerable errors. Recoil Distance Doppler Shift (RDDS) experiments were performed employing the Cologne coincidence plunger device to measure lifetimes with high precision in order to deduce model-independent B(E2) values for the 21+ → 01+ transition. Excited states in the nuclei of interest were populated with fusion-evaporation reactions. γ rays were detected by an array of 12 HPGe detectors, positioned at favourable forward and backward angles with respect to the beam axis. First results on 44Ti, 48Cr and 52Fe will be presented.
[1] S. M. Lenzi, F. Nowacki, A. Poves, and K. Sieja, Phys. Rev. C 82, 054301 (2010).