Münster 2017 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 48: Structure and Dynamics of Nuclei VII

HK 48.1: Talk

Thursday, March 30, 2017, 16:45–17:00, F 2

Lifetime Measurements in ⁶¹Zn — •M. Queiser, A. Vogt, P. Reiter, R. Altenkirch, K. Arnswald, T. Braunroth, A. Dewald, C. Fransen, B. Fu, R. Hetzenegger, R. Hirsch, V. Karayonchev, L. Kaya, L. Lewandowski, C. Müller-Gatermann, J.-M. Regis, D. Rosiak, D. Schneiders, M. Seidlitz, B. Siebeck, T. Steinbach, and K. Wolf — Institut für Kernphysik, Universität zu Köln

Lifetimes of excited states in the neutron-deficient nucleus ⁶¹Zn were measured employing the Recoil-Distance Doppler-Shift (RDDS) and the Fast-Timing Method at the University of Cologne. The nucleus of interest was populated as an evaporation residue in ⁴⁰Ca(²⁴Mg,n2p)⁶¹Zn and ⁵⁸Ni(α,n)⁶¹Zn reactions at 67 MeV and 19 MeV, respectively. Five lifetimes are measured for the first time, including the 5/2⁻ → 3/2⁻ transition depopulating the 124-keV isomer. Short lifetimes from the RDDS analysis are corrected for Doppler-Shift Attentuation (DSA) effects in the stopper foil. Ambiguous results from previous measurements were resolved. The obtained lifetimes are compared to predictions from different sets of shell-model calculations. Supported by the Bonn-Cologne Graduate School of Physics and Astronomy.