Inelastic Neutron Scattering at nELBE

At the nELBE facility at Forschungszentrum Dresden-Rossendorf fast neutrons with kinetic energies of 0.1 to 10 MeV will be used to deliver nuclear data on neutron induced reactions necessary for the development of future nuclear transmutation facilities and new types of nuclear reactors. Electrons from the superconducting electron linac ELBE are shot onto a liquid lead target where they produce Bremsstrahlung which in turn liberates neutrons via (gamma,n) reactions. The short pico-second pulse structure of the electron beam enables neutron time-of-flight experiments with very short flight paths of 4-7 meters obtaining energy resolutions of about 1 %.

First experiments on inelastic neutron scattering on ⁵⁶Fe where performed using a double time-of-flight setup based on proton recoil detectors [2] and an array of 42 BaF$_2$ crystals to detect the emitted photons and neutrons in coincidence. First results will be presented.