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HK: Fachverband Physik der Hadronen und Kerne

HK 48: Structure and Dynamics of Nuclei VII

HK 48.3: Vortrag

Donnerstag, 30. März 2017, 17:15–17:30, F 2

Extracting lifetimes via the Doppler-shift attenuation method using pγ coincidences in Cologne — •Sarah Prill¹, Michelle Färber¹, Pavel Petkov^1,2,3, 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)

Recently, a new technique to determine lifetimes of excited states from a few to hundreds of femtoseconds has been established in Cologne: the Doppler-shift attenuation method (DSAM) using pγ coincidences [1]. The SONIC@HORUS setup with its 14 HPGe detectors and several silicon detectors enables to extract the centroid-energy shifts from proton-gated γ-ray spectra, yielding lifetime values that are independent of feeding contributions. This contribution will introduce this (p,p′γ) DSAM technique and show the results of measurements on ⁹⁶Ru [1], ⁹⁸Ru, ^112,114Sn, and ⁹⁴Zr.

Supported by the DFG (ZI-510/7-1). S.P. and J.W. are supported by the Bonn-Cologne Graduate School of Physics and Astronomy.

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