Köln 2025 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 23: Poster

HK 23.8: Poster

Dienstag, 11. März 2025, 17:30–19:00, Foyer Physik

Lifetime measurements of excited states in ¹⁰¹Pd — •Sven Wagner, Maximilian Droste, Peter Reiter, Casper-David Lakenbrink, Christoph Fransen, and Franziskus von Spee — Institut für Kernphysik, Universität zu Köln

The ¹⁰¹Pd nucleus is located four protons and five neutrons away from the double-shell closure at ¹⁰⁰Sn. Nuclei in this part of the Segrè chart have historically been considered prototypical examples of vibrational nuclei, exhibiting characteristic level schemes in their first excited states. Lifetimes and transition strength values of excited states in ¹⁰¹Pd are scarcely known, and independently evaluated results for the first excited state are contradictory [1,2]. A precise lifetime measurement, serving as a complementary method for determining reduced transition strengths in ¹⁰¹Pd, was performed at the FN Tandem accelerator of the IKP Cologne using the Recoil-Distance Doppler-Shift (RDDS) technique. The excited states of ¹⁰¹Pd were populated via the fusion-evaporation reaction ⁹²Zr(¹²C,3n)¹⁰¹Pd at a beam energy of 50 MeV. First lifetime values obtained from this study will be presented, providing new insights into the nuclear structure of ¹⁰¹Pd.

[1] D. Ivanova et al., Phys. Rev. C. 105, 034337 (2022)

[2] M. Droste et al., Phys. Rev. C. 106, 024329 (2022)

Keywords: Lifetime measurement; RDDS; Nuclear structure