The particle spectrometer SONIC for particle-γ coincidence measurements was commissioned at the Institute for Nuclear Physics in Cologne, Germany. SONIC consists of up to 12 silicon ΔE-E telescopes with a total solid angle coverage of 9%, and will complement HORUS, a γ-ray spectrometer with 14 HPGe detectors. The combined setup SONIC@HORUS is used to investigate the γ-decay behaviour of low-spin states up to the neutron separation threshold excited by light-ion inelastic scattering and transfer reactions using beams provided by a 10 MV FN Tandem accelerator. The particle-γ coincidence method will be presented using data from a 92Mo(p,p'γ) experiment. In a 119Sn(d,X) experiment, excellent particle identification has been achieved because of the good energy resolution of the silicon detectors of approximately 20 keV. Due to the non-negligible momentum transfer in the reaction, a Doppler correction of the detected γ-ray energy has to be performed, using the additional information from measuring the ejectile energy and direction. The high sensitivity of the setup is demonstrated by the results from a 94Mo(p,p'γ) experiment, where small γ-decay branching ratios have been deduced.
@article{arxiv.1710.07106,
title = {Combining {\gamma}-ray and particle spectroscopy with SONIC@HORUS},
author = {S. G. Pickstone and M. Weinert and M. Färber and F. Heim and E. Hoemann and J. Mayer and M. Müscher and S. Prill and P. Scholz and M. Spieker and V. Vielmetter and J. Wilhelmy and A. Zilges},
journal= {arXiv preprint arXiv:1710.07106},
year = {2017}
}