Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 45: Postersession
HK 45.12: Poster
Mittwoch, 16. März 2016, 18:30–20:30, S1/05 22-24
Lifetimes in 94Zr extracted via the Doppler-shift attenuation method using pγ coincidences — •Sarah Prill1, Vera Derya1, Andreas Hennig1, Pavel Petkov1,2,3, Simon G. Pickstone1, Mark Spieker1, Vera Vielmetter1, Julius Wilhelmy1, and Andreas Zilges1 — 1Institute for Nuclear Physics, University of Cologne, Cologne (Germany) — 2INRNE, Bulgarian Academy of Sciences, Sofia (Bulgaria) — 3National Institute for Physics and Nuclear Engineering, Bucharest (Romania)
Lifetimes of excited states in 94Zr were previously measured applying the Doppler-shift attenuation method (DSAM) following the (n,n′γ) reaction [1,2]. Since the two measurements were in conflict with each other, we remeasured 14 lifetimes of excited states in 94Zr in a (p,p′γ) experiment utilizing the DSAM technique [3]. Centroid-energy shifts were extracted from proton-gated γ-ray spectra, yielding lifetime values that are independent of feeding contributions. The results were compared to the previously measured lifetimes and found to be in good agreement with the values reported in Ref. [2], thus confirming the correction procedure introduced in Ref. [2] for the (n,n′γ) data. This contribution will feature our new results and introduce the (p,p′γ) DSAM technique, which is now available in Cologne.
Supported by the DFG (ZI-510/7-1). S.P., S.G.P., M.S. and J.W. are supported by the Bonn-Cologne Graduate School of Physics and Astronomy. [1] E. Elhami et al., Phys. Rev. C 88 (2013) 024317, [2] E.E. Peters et al., Phys. Rev. C 78 (2008) 064303, [3] A. Hennig et al., NIM A 758, 171 (2015)