Bochum 2018 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 10: Structure and Dynamics of Nuclei II
HK 10.6: Talk
Monday, February 26, 2018, 18:00–18:15, HZO 70
Lifetime determination in 211At via γ-γ fast-timing spectroscopy — •Vasil Karayonchev1, Piet Van Isacker2, Andrey Blazhev1, Christoph Fransen1, Jan Jolie1, and Jean-Marc Régis1 — 1Institute for Nuclear Physics, University of Cologne — 2Grand Accélérateur National d’Ions Lourds, BP 55027, F-14076 Caen Cedex 5, France
Lifetimes of excited states in 211At were measured using the electronic γ-γ fast timing technique [1]. The nucleus of interested was populated in a 208Pb(6Li,3n)211At fusion-evaporation reaction at the the 10 MV Tandem accelerator at the Institute for Nuclear Physics, University of Cologne. The lifetimes of the 17/21−, 23/21− states were determined for the first time. The experimental results are compared to two shell model calculations, one using the modified Kuo-Herling interaction [2] and the other using an empirical interaction for 3 particles in a single j=9/2 shell.
Supported by DFG grant JO391/16-1
[1] J-M Régis et al., Nucl. Instrum. Methods Phys. A Res. 726 (2013).
E.K. Warburtion, and B.A. Brown, Phys. Rev. C 43 (1991) 602.