Frankfurt 2014 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 30: Hadronenstruktur und -spektroskopie
HK 30.6: Vortrag
Mittwoch, 19. März 2014, 18:00–18:15, HZ 1+2
The Low Energy Photon Tagger NEPTUN: Toward a Detailed Study of the Pygmy Dipole Resonance with Real Photons — •Diego Semmler1, T. Aumann1, C. Bauer1, M. Baumann1, M. Beckstein1, J. Beller1, A. Blecher1, N. Cvejin1, M. Duchêne1, F. Hug1, J. Kahlbow1, M. Knörzer1, K. Kreis1, C. Kremer1, R. Lefol4, B. Löher2,3, P. Ries1, C. Romig1, H. Scheit1, L. Schnorrenberger1, D. Symochko1, and C. Walz1 — 1Institut für Kernphysik, Darmstadt, Germany — 2ExtreMe Matter Institute EMMI and Research Division, Frankfurt, Germany — 3Institute for Advanced Studies FIAS, Frankfurt, Germany — 4University of Saskatchewan, Saskatoon, Canada
The low energy photon tagger NEPTUN at the S-DALINAC delivers a quasi-monoenergetic photon beam between about 4 MeV and 20 MeV with a resolution of approximately 25 keV. Tagged photons provide the possibility to measure the dipole strength of nuclei in the energy range below and above the neutron threshold. The highly efficient LaBr3 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. We will measure (γ,n)- and (γ,nγ)-reactions with neutron detectors based on plastic scintillators.
This talk provides an overview about setup and goals of the NEPTUN experiment as well as the current state of the commissioning phase. Planned optimizations of the setup, based on the results of a test beam time in June 2013, are also presented.
Supported by DFG (SFB 634)