Bochum 2009 – wissenschaftliches Programm

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HK: Fachverband Hadronen und Kerne

HK 50: Nuclear Astrophysics

HK 50.5: Vortrag

Mittwoch, 18. März 2009, 15:15–15:30, H-ZO 60

Efficiency calibration of the ELBE nuclear resonance fluorescence setup using a proton beam — •Erik Trompler¹, Daniel Bemmerer¹, Roland Beyer¹, Carlo Broggini², Antonio Caciolli², Martin Erhard¹, Zsolt Fülöp³, Eckart Grosse¹, György Gyürky³, Roland Hannaske¹, Arnd Rudolf Junghans¹, Michele Marta¹, Roberto Menegazzo², Chithra Nair¹, Roland Schwengner¹, Tamas Szücs³, Andreas Wagner¹, and Dmitry Yakorev¹ — ¹Forschungszentrum Dresden-Rossendorf (FZD), Dresden, Germany — ²INFN Sezione di Padova, Padova, Italy — ³ATOMKI, Debrecen, Hungary

The nuclear resonance fluorescence (NRF) setup at ELBE uses bremsstrahlung with endpoint energies up to 20 MeV. The setup consists of four 100% high-purity germanium detectors, each surrounded by a BGO escape-suppression shield and a lead collimator. The detection efficiency up to E_γ = 12 MeV has been determined using the proton beam from the FZD Tandetron and well-known resonances in the ¹¹B(p,γ)¹²C, ¹⁴N(p,γ)¹⁵O, and ²⁷Al(p,γ)²⁸Si reactions. The deduced efficiency curve allows to check efficiency curves calculated with GEANT. Future photon-scattering work can be carried out with improved precision at high energy. — This work has been supported in part by the European Union (FP6 AIM RITA 025646).