Frankfurt 2014 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 46: Poster

HK 46.23: Poster

Donnerstag, 20. März 2014, 16:00–18:00, HZ Poster

Lifetime of the first excited 2⁺ state in ¹⁷²Hf and ¹⁷⁴Hf — •Rosa-Belle Gerst, Simon Stegemann, Jan Jolie, Jean-Marc Régis, Matthias Rudigier, Nima Saed-Samii, and Karl Oskar Zell — Institut für Kernphysik, Universität zu Köln, Zülpicher Str. 77, 50937 Köln

Using the ¹⁷⁰Yb(α,2n) and ¹⁷²Yb(α,2n) reactions the lifetimes of the first excited 2⁺ state in ¹⁷²Hf and ¹⁷⁴Hf have been measured in fast-timing experiments using the Cologne Orange-Spectrometer and 6 LaBr₃(Ce)-Detectors. The lifetimes were obtained analyzing e⁻-γ-coincidence time-spectra with the slope method. The new and more precise lifetimes correct existing, outdated lifetimes in nuclear databases. Additionally, the systematics of the B(E2,2₁⁺→0₁⁺) is studied.

This work was supported by the Deutsche Forschungsgemeinschaft (JO 391/16-1).