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HK: Fachverband Physik der Hadronen und Kerne
HK 72: Poster
HK 72.33: Poster
Thursday, March 14, 2024, 17:15–18:45, HBR 14: Foyer
Lifetime measurements of excited states in 69As — •Sven Wagner, Maximilian Droste, and Peter Reiter — Institut für Kernphysik, Universität zu Köln
Lifetime measurements in 69As were motivated by the expected evolution of the shape of this nucleus, from oblate at low spin to triaxial prolate at intermediate spin [1]. Lifetimes and transition strengths values of excited states in 69As are not well known yet and independent evaluated results are contradictory. Excited states were populated via the fusion evaporation reaction 40Ca(32S,3p)69As at 100 MeV at the FN tandem accelerator at the University of Cologne. The Cologne plunger device, surrounded by an efficient γ-ray detector array comprising 18 HPGe detectors was employed to determine lifetimes with the recoil-distance Doppler-shift method using the differential decay-curve method in coincidence mode. First lifetime values, which deviate from previous results, will be presented.
[1] A. M. Bruce et al., Phys. Rev. C. 62, 027303 (2000)
Keywords: Lifetime measurement; RDDS