Bonn 2020 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 45: Structure and Dynamics of Nuclei VIII

HK 45.7: Vortrag

Donnerstag, 2. April 2020, 15:45–16:00, J-HS E

Lifetime measurements in 102Ru via the Doppler-shift attenuation method using pγ coincidences — •Vera Everwyn1, Anna Bohn1, Michelle Färber1, Florian Kluwig1, Pavel Petkov2,1, Sarah Prill1, Philipp Scholz1, Michael Weinert1, Julius Wilhelmy1, and Andreas Zilges11Institute for Nuclear Physics, University of Cologne — 2National Institute for Physics and Nuclear Engineering, Bucharest, Romania

The chain of stable ruthenium isotopes is well suited to study the evolution of nuclear structure, like mixed-symmetry states, along shape-transitional paths in the A= 100 mass region from spherical (96,98Ru) to deformed shapes (104Ru). Transition probabilities are a key component for understanding nuclear structure and can be deduced from lifetimes, branching, and multipole mixing ratios. However, the information on level lifetimes in 102Ru is scarce. Therefore, an inelastic proton-scattering experiment on 102Ru was performed using the SONIC@HORUS setup at the University of Cologne [1]. Lifetimes of excited states were measured via the Doppler-shift attenuation method, which benefits from the exclusion of feeding contributions due to the acquired pγ-coincidence data [2]. First results of this experiment will be presented and compared to the neighboring nuclei 96,98,100Ru.

Supported by the DFG (ZI-510/9-1). A.B. is supported by the Bonn-Cologne Graduate School for Physics and Astronomy.

[1] S. G. Pickstone et al., Nucl. Instr. and Meth. A 875 (2017) 104-110

[2] A. Hennig et al., Nucl. Instr. and Meth. A 794 (2015) 171

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