SMuK 2023 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 49: Structure and Dynamics of Nuclei IX

HK 49.2: Vortrag

Mittwoch, 22. März 2023, 17:45–18:00, SCH/A118

Investigation of γ-softness: Lifetime measurements in ^104,106Ru — •Arwin Esmaylzadeh¹, Andrey Blazhev¹, Kosuke Nomura², Jan Jolie¹, Marcel Beckers¹, Christoph Fransen¹, Rosa-Belle Gerst¹, Andreas Harter¹, Vasil Karayonchev^1,3, Lukas Knafla¹, Mario Ley¹, and Franziskus von Spee¹ — ¹Insitute for Nuclear Physics, University of Cologne — ²Department of Physics, University of Zagreb — ³TRIUMF, Canada

Lifetimes of the 2₁⁺, 4₁⁺, 6₁⁺, 2_γ⁺ and 3_γ⁺ states in ^104,106Ru were measured using the recoil distance Doppler shift technique and the Cologne Plunger device. Low-lying excited states in both nuclei were populated in a ¹⁰⁴Ru(¹⁸O, ¹⁸O)¹⁰⁴Ru* inelastic scattering and in a ¹⁰⁴Ru(¹⁸O, ¹⁶O)¹⁰⁶Ru two-neutron transfer reaction using the Cologne FN Tandem accelerator. The experimental energy levels and deduced electromagnetic transition probabilities are compared in the context of γ-softness and the mapped interacting boson model with input from the microscopic self-consistent mean-field calculation using a Gogny interaction [1]. The newly obtained results for the γ band, give a more detailed insight about the triaxial behavior of ^104,106Ru. The results will be discussed in the context of γ soft and rigid triaxial behavior which is present in the neutron-rich Ru isotopes [2]. This work supported by BMBF erbundprojekt 05P2021 (ErUM-FSP T07) grant 05P21PKFN1.
[1] K. Nomura et al., Phys. Rev. C 94, 044314 (2016)
[2] A. Esmaylzadeh et al., Phys. Rev. C (accepted in PRC) (2022)