Köln 2025 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 26: Structure and Dynamics of Nuclei VII

HK 26.3: Talk

Wednesday, March 12, 2025, 14:45–15:00, HS 2 Physik

Lifetime determination and level-scheme reconstruction in ¹⁰⁴Ru using particle-γ coincidences — •Anna Bohn, Elias Binger, Tobias Langel, Sarah Prill, Michael Weinert, and Andreas Zilges — University of Cologne, Institute for Nuclear Physics, Germany

The Cologne particle-γ detector array SONIC@HORUS [1] is a powerful tool for nuclear structure investigations. It enables the measurement of p-γ and p-γ-γ coincidences, providing full reaction kinematics while excluding feeding contributions from higher-lying states. This capability makes it an ideal setup for the (p,p’γ) Coincidence Doppler-Shift Attenuation Method (CDSAM) [2,3], enabling lifetime measurements in the sub-picosecond regime, as well as level-scheme reconstruction. Several CDSAM experiments on stable even-even isotopes along the A ≈ 100 mass region have been performed at the University of Cologne in recent years [4-6]. Results obtained on ¹⁰⁴Ru via p-γ and p-γ-γ coincidence analysis will be presented in this contribution.
Supported by the DFG (ZI 510/9-2).
[1] S. G. Pickstone et al., Nucl. Instr. Meth. A 875 (2017) 104.
[2] A. Hennig et al., Nucl. Instr. Meth. A 794 (2015) 171.
[3] M. Spieker et al., Phys. Rev. C 97 (2018) 054319.
[4] A. Hennig et al., Phys. Rev. C 92 (2015) 064317.
[5] S. Prill et al., Phys. Conf. Ser. 1643 (2020) 012157.
[6] S. Prill et al., Phys. Rev. C 105 (2022) 034319.

Keywords: Ru; CDSAM; lifetime measurements