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HK: Fachverband Physik der Hadronen und Kerne

HK 57: Instrumentierung

HK 57.7: Talk

Friday, March 21, 2014, 12:45–13:00, HZ 9

Fission experiments nELBE — •Toni Kögler^1,2, Roland Beyer², Roland Hannaske^1,2, Arnd Junghans², Ralph Massarczyk^1,2, Ronald Schwengner², and Andreas Wagner² — ¹Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany — ²Technische Universität Dresden, 01062 Dresden, Germany

At the Center for High-Power Radiation Sources at Helmholtz-Zentrum Dresden-Rossendorf fast neutron-induced fission cross section experiments on ²³⁵U and ²⁴²Pu are investigated by a parallel plate fission ionization chamber. To optimize the chamber parameters extensive Geant4 simulations with GEF code generated fission observable inputs have been used. Pile-up effects had to be included due to the high α-activity of the plutonium targets. Experimental data from a comparative measurement with PTB’s H19 transfer device is presented. Using the HZDR nanosecond pre-amplifier with total signal times of 500 ns reduces the α pile-up and enables a QDC based data processing.