Bonn 2020 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 45: Structure and Dynamics of Nuclei VIII

HK 45.6: Vortrag

Donnerstag, 2. April 2020, 15:30–15:45, J-HS E

Direct Lifetime Measurement in 104Pd — •Maximilian Droste, Konrad Arnswald, Rouven Hirsch, Levent Kaya, Lars Lewandowski, Claus Müller-Gatermann, Peter Reiter, Michael Seidlitz, and Burkhard Siebeck — Institut für Kernphysik, Universität zu Köln

A precise lifetime measurement, as a complementary approach to determine reduced transition strengths in 104Pd, was performed at the FN Tandem accelerator of the IKP Cologne employing the Recoil-Distance Doppler-Shift method. Excited states of 104Pd were populated via the fusion evaporation reaction 96Zr(12C,4n)104Pd at 55 MeV. The B(E2; 2+ → 0+) value of the first excited state in 104Pd has so far only been investigated via Coulomb excitation. Information on complementary, model-independent approaches like lifetime measurements, to determine reduced transition strengths in 104Pd, are lacking. New lifetime values, which deviate strongly from the evaluated values, will be presented and reduced transition probabilities will be compared to previous results and shell model calculations. Due to its low excitation energy of the 2+ state at 556 keV and its enhanced collectivity the mid-shell nucleus 104Pd is used as target material in Coulomb-excitation experiments at, e.g., radioactive ion-beam facilities. For these experiments precise knowledge of the reduced E2 transition probabilities and the correlated quadrupole moments of the target materials are mandatory.

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