Mainz 2022 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 53: Hadron Structure and Spectroscopy X

HK 53.5: Vortrag

Mittwoch, 30. März 2022, 17:15–17:30, HK-H9

Lifetime measurements in the ground-state band in ¹⁰⁴Pd — •Maximilian Droste¹, Andrey Blazhev¹, Peter Reiter¹, Nigel Warr¹, Konrad Arnswald¹, Marcel Beckers¹, Robert Hetzenegger¹, Rouven Hirsch¹, Levent Kaya¹, Lukas Knafla¹, Lars Lewandwoski¹, Claus Müller-Gatermann¹, Pavel Petkov^2,1, Dawid Rosiak¹, Burkhard Siebeck¹, Andreas Vogt¹, and Kai Wolf¹ — ¹Institut für Kernphysik, Universität zu Köln — ²Horia Hulubei National Institute for Physics and Nuclear Engineering, Romania

Direct lifetime measurements in ¹⁰⁴Pd were motivated to close a gap along the Pd isotope chain. Excited states were populated via the fusion evaporation reaction ⁹⁶Zr(¹²C,4n)¹⁰⁴Pd at 55 MeV. Lifetime values and reduced transition probabilities were determined in the ground-state band up to the 12⁺ state in ¹⁰⁴Pd employing the Recoil Distance Doppler-Shift method. The new B(E2; 2⁺ → 0⁺) value deviates from the evaluated values, which were determined using Coulomb excitation. The transition strengths of higher lying states were obtained for the first time. Recent investigations in other medium weight even-even Pd isotopes question the vibrational character of these Pd isotopes. The experimental results are compared to Large Scale Shell-Model calculations (LSSM) employing the Sr88MHJM interaction. LSSM along the ⁹⁶⁻¹⁰⁶Pd isotope chain were performed allowing detailed comparison of level schemes and reduced transition strength values.