J. Beller

The high-efficiency γ-ray spectroscopy setup γ3 at HIγS

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

Linking partial and quasi dynamical symmetries in rotational nuclei

1^+

Magnetic dipole excitations ofCr50

level at 8125.4 keV to the first excited

Dipole response of the odd-proton nucleus 205Tl up to the neutron-separation energy

2^+

Investigation of the Photon Strength Function in 130 Te

state was determined to 15.7(3)%.

Nuclear Resonance Fluorescence off 54Cr: The Onset of the Pygmy Dipole Resonance

Symmetries play an important role in the understanding of complex systems. However, complete dynamical symmetries are manifest in only a few nuclei. By establishing a link between two hitherto unrelated symmetry concepts, the authors show that partial fulfillment of diverse symmetries may simultaneously occur in certain atomic nuclei.

Quadrupole decay strength of the M1 scissors mode

The low-lying

Progress on M1 Research

M1

Contemporary research with nuclear resonance fluorescence at the S-DALINAC

-strength of the open-shell nucleus

News on the Scissors Mode

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