München 2019 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 21: Structure and Dynamics of Nuclei III
HK 21.1: Gruppenbericht
Dienstag, 19. März 2019, 14:00–14:30, HS 14
Lifetime determination via the Doppler-shift attenuation method using particle-γ coincidences in Cologne — •S. Prill1, A. Bohn1, V. Everwyn1, M. Färber1, F. Kluwig1, P. Petkov1,2, S.G. Pickstone1, P. Scholz1, M. Spieker3, M. Weinert1, J. Wilhelmy1, and A. Zilges1 — 1University of Cologne, Institute for Nuclear Physics — 2National Institute for Physics and Nuclear Engineering, Bucharest-Magurele — 3NSCL, Michigan State University, MI48824, USA
The Doppler-shift attenuation method using proton-γ coincidences as performed in Cologne is a well established method to extract lifetimes of excited nuclear levels in the sub-picosecond range [1]. In the past two years, the particle spectrometer SONIC with up to 12 silicon detectors in combination with the γ-ray detection array HORUS with its 14 HPGe detectors was used for p-γ coincidence measurements on various nuclei, such as 96Ru [1], 112,114Sn [2], 128,130Te and 164Dy. Numerous extracted lifetimes were derived and used to identify mixed-symmetry states and analyse the systematics of low-spin states. In this contribution, the method as well as recent improvements and additions in combination with experimental results will be presented. Supported by DFG (ZI 510/9-1). A.B. is supported by the Bonn-Cologne Graduate School of Physics and Astronomy.
[1] A. Hennig et al., NIM A 794, 171 (2015)
[2] M. Spieker et al., Phys. Rev. C 97, 054319 (2018)
[3] S.G. Pickstone et al., NIM A 875, 104 (2017)