Erlangen 2026 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 13: Structure and Dynamics of Nuclei III
HK 13.5: Vortrag
Dienstag, 17. März 2026, 17:45–18:00, AM 00.011
Lifetimes of Excited States in the Normal and Superdeformed Bands of Doubly Magic 40Ca — •Timon Sültenfuß1, Maximilian Droste1, Peter Reiter1, Andrey Blazhev1, Duy Duc Dao2, Frédéric Nowacki2, Konrad Arnswald1, Anna Bohn1, Ramona Burggraf1, Hannah Kleis1, Sarah Prill1, Michael Weinert1, and David Werner1 — 1Institut für Kernpyhsik, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany — 2Université de Strasbourg, IPHC, 23 rue du Loess, 67037 Strasbourg, France
Lifetimes of excited states in the doubly magic nucleus 40Ca have been measured in an experiment performed at the FN tandem accelerator of the University of Cologne. Excited states were populated via the (p,p′γ) reaction at a proton beam energy of 15 MeV. The detector array SONIC@HORUS, comprising 12 silicon detectors for charged-particle identification and 14 HPGe detectors for high-resolution γ-ray spectroscopy, was used to measure scattered protons and emitted γ-rays, respectively. Lifetimes of the first excited 2+, 4+, and 6+ states were extracted using the Doppler-Shift Attenuation Method. The new results were compared with recent large-scale shell model calculations, showing excellent agreement for the level scheme as well as the new lifetimes which are identified as members of a normal-deformed structure in 40Ca. In addition, preliminary lifetime results for states in the superdeformed band of 40Ca will be presented and compared with state-of-the-art shell-model predictions.
Keywords: Lifetime measurement; DSAM; Deformation; B(E2) values