Heidelberg 2015 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 51: Instrumentation 16

HK 51.4: Vortrag

Donnerstag, 26. März 2015, 15:30–15:45, M/HS2

The Photon Tagger NEPTUN at S-DALINAC: Current Status and Research Program — •Diego Semmler, Michaela Arnold, Thomas Aumann, Martin Baumann, Michael Beckstein, Alexander Blecher, Nebojsa Cvejin, Florian Hug, Christopher Lehr, Norbert Pietralla, Heiko Scheit, Dmytro Symochko, Christopher Walz, and Tim Wessels — Institut für Kernphysik, Darmstadt, Germany

The low energy photon tagger NEPTUN at the S-DALINAC delivers a quasi-monoenergetic photon beam between about 1 MeV and 20 MeV with a resolution of approximately 25 keV. Tagged photons provide the possibility to measure the full dipole strength of nuclei in the energy range below and above the neutron threshold. The highly efficient LaBr₃:Ce based spectrometer GALATEA will be used to detect not only the direct decays to the ground state, but also cascading decays can be measured with suitable efficiency. To measure (γ, n)- and (γ, nγ)-reactions the setup will be extended by neutron detectors based on liquid scintillators.

The data will be combined with experiments at Duke University, GSI and RIKEN to obtain a complete picture of dipole strength function evolution in Sn isotopes.

This talk will cover the link between the different experiments and focus on the setup and status of the NEPTUN commissioning program. If available, data from the first runs with Sn will be shown.

Supported by DFG (SFB 634)