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HK: Fachverband Physik der Hadronen und Kerne

HK 19: Structure and Dynamics of Nuclei V

HK 19.1: Group Report

Tuesday, March 12, 2024, 15:45–16:15, HBR 19: C 5b

Lifetime measurements in the A≈100 mass region via the coincidence Doppler-shift attenuation method — •Anna Bohn, Elias Binger, Sarah Prill, Michael Weinert, and Andreas Zilges — University of Cologne, Institute for Nuclear Physics, Germany

The coincidence Doppler-shift attenuation method (CDSAM) is a powerful technique to determine nuclear level lifetimes in the sub-picosecond regime [1,2]. Several CDSAM experiments have been performed at the SONIC@HORUS setup [3] at the University of Cologne, including (p,p’γ) and (α,α’γ) experiments along the Zr, Ru, Sn and Te isotopic chains [4,5,6]. The combined SONIC@HORUS spectrometer enables coincident detection of γ rays and backscattered beam particles, thus, allowing for background reduction, precise transition selection and feeding exclusion, while several dozens of lifetimes can be determined from each data set.
Recent results on lifetime determination and spectroscopy benefitting from coincidence measurements will be presented within this contribution.
Supported by the DFG (ZI-510/9-2).

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

[2] M. Spieker et al. Phys. Rev. C 97 (2018) 054319

[3] S. G. Pickstone et al. Nucl. Instr. Meth. A 875, (2017) 104

[4] S. Prill et al. Phys. Rev. C 105 (2022) 034319

[5] A. Hennig et al. Phys. Rev. C 92 (2015) 064317

[6] S. Prill et al. Phys. Conf. Ser. 1643 (2020) 012157

Keywords: CDSAM; lifetime measurements