Publications [#313739] of Anton P. Tonchev

Papers Published
  1. Löher, B; Derya, V; Aumann, T; Beller, J; Cooper, N; Duchene, M; Endres, J; Fiori, E; Isaak, J; Kelley, J; Knörzer, M; Pietralla, N; Romig, C; Scheck, M; Scheit, H; Silva, J; Tonchev, AP; Tornow, W; Weller, H; Werner, V; Zilges, A, The high-efficiency γ-ray spectroscopy setup γ3 at HIγS, vol. 723 (June, 2013), pp. 136-142 [doi] .

    The existing Nuclear Resonance Fluorescence (NRF) setup at the HI{\gamma}S facility at the Triangle Universities Nuclear Laboratory at Duke University has been extended in order to perform {\gamma}-{\gamma} coincidence experiments. The new setup combines large volume LaBr3:Ce detectors and high resolution HPGe detectors in a very close geometry to offer high efficiency, high energy resolution as well as high count rate capabilities at the same time. The combination of a highly efficient {\gamma}-ray spectroscopy setup with the mono-energetic high-intensity photon beam of HI{\gamma}S provides a worldwide unique experimental facility to investigate the {\gamma}-decay pattern of dipole excitations in atomic nuclei. The performance of the new setup has been assessed by studying the nucleus \sulfur at 8.125 MeV beam energy. The {\gamma}-decay branching ratio from the $1^+$ level at 8125.4 keV to the first excited $2^+$ state was determined to 15.7(3)%.