Open Access

Arnd Rudolf Junghans, Roland Beyer, Jürgen Claußner, Toni Kögler, Sebastian Urlaß, Daniel Bemmerer, Anna Ferrari, Ronald Schwengner, Andreas Wagner, Mirco Dietz, Axel Frotscher, Marcel Grieger, Thomas Hensel, Martina Koppitz, Felix Ludwig, Steffen Turkat, Ralf Nolte, Elisa Pirovano, Stefan Kopecky, Markus Nyman, Arjan J. M. Plompen, Peter Schillebeeckx, Erik Borris, René Reifarth, Daniel Veltum, Mario Weigand, Jan Glorius, Joachim Görres, Uwe Oberlack, Daniel Wenz

• Neutron total cross sections are an important source of experimental data in the evaluation of neutron-induced cross sections. The sum of all neutron-induced reaction cross sections can be determined with a precision of a few per cent in a relative measurement. The neutron spectrum of the photoneutron source nELBE extends in the fast region from about 100 keV to 10 MeV and has favourable conditions for transmission measurements due to the low instantaneous flux of neutrons and low gamma-flash background. Several materials of interest (in part included in the CIELO evaluation or on the HPRL of OECD/NEA) have been investigated: 197Au [1, 2], natFe [2], natW [2], 238U, natPt, 4He, natO, natNe, natXe. For gaseous targets high pressure gas cells with flat end-caps have been built that hold up to 200 bar pressure. The experimental setup will be presented including results from several transmission experiments and the data analysis leading to the total cross sections will be discussed.