Speaker
Description
The coincidence Doppler-shift attenuation method (CDSAM) is a powerful technique for determining nuclear level lifetimes in the femtosecond regime [1,2].
At the SONIC@HORUS setup [3] at the University of Cologne, several (p,p'$\gamma$)- and ($\alpha$,$\alpha$'$\gamma$)-CDSAM experiments have been performed with a focus on the A $\approx$ 100 mass region, including Zr, Ru, Pd, Sn, and Te isotopes [4,5,6]. The combined SONIC@HORUS spectrometer allows for coincident detection of $\gamma$ rays and backscattered beam particles, enabling background reduction, precise transition selection and feeding exclusion. From each experiment, dozens of lifetimes can be determined. Additionally, the analysis of particle-$\gamma$-$\gamma$ coincidences enables thorough and comprehensive spectroscopy.
In this contribution, recent results on lifetime determination and spectroscopy will be presented, highlighting the benefits derived from coincidence measurements.
Supported by the DFG (ZI-510/9-2).
[1] A. Hennig et al., Nucl. Instr. and Meth. A 794, (2015) 171
[2] M. Spieker et al., Phys. Rev. C 97, (2018) 054319
[3] S. G. Pickstone et al., Nucl. Instr. and 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
