SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 4: Instrumentation III
HK 4.1: Gruppenbericht
Montag, 20. März 2023, 16:30–17:00, SCH/A117
Measurements with fast neutrons nELBE — •Roland Beyer1, Roberto Capote2, and Arnd R. Junghans1 — 1Helmholtz-Zentrum Dresden - Rossendorf, Dresden, Germany — 2International Atomic Energy Agency, Vienna, Austria
The neutron time-of-flight facility nELBE at Helmholtz-Zentrum Dresden-Rossendorf features the first photo-neutron source at a superconducting electron accelerator, which provides a very precise time structure, high repetition rate and favorable background conditions due to the low instantaneous flux and the absence of any moderating materials. The neutron energy spectrum ranges from about 100 keV up to 10 MeV. The resulting very flexible beam properties at nELBE enable a broad range of nuclear physics experiments, e.g. determination of the reaction cross section of elastic and inelastic neutron scattering or neutron induced fission or the determination of the response of detectors for in-situ particle range verification during cancer treatment with proton or ion beams.
As an examples the neutron transmission measurement of thick iron samples will be described in detail. The results of this measurement help to eliminate significant shortcomings in the resolved resonance region of all existing evaluations of iron isotopes that have been identified in leakage neutron measurements to be related to inaccurate elastic cross sections minima between 50 and 700 keV.
This project has received funding from the Euratom research and training programme 2014-2018 under grant agreement No 847594 (ARIEL).