Speaker
Description
Studies of neutron-induced reactions are of considerable significance, both for their importance to basic research in nuclear physics as well as for practical applications in nuclear technology, medicine and industry. These tasks require improved nuclear data and higher precision cross sections for neutron-induced reactions on various isotopes.
In this framework, over the past 15 years, an extensive study of neutron-induced reaction cross-sections has been carried out at the neutron beam facility of the National Centre for Scientific Research (NCSR) “Demokritos” by the Nuclear Physics Group of the National Technical University of Athens (NTUA). The measurements were carried out with quasi-monoenergetic neutron beams produced via charged particle reactions on solid and gas targets. For the fission cross section measurements, the detection of the fission fragments was achieved with the use of Micromegas detectors, while for the activation measurements, the induced γ-ray activity of the samples was measured off-line by HPGe detectors of 80%, 50% and 16% relative efficiency. Special attention was given to the characterization of the neutron beam and the estimation of the parasitic neutrons, through experimental techniques as well as Monte Carlo simulations of the neutron beam and experimental setup. Furthermore, statistical model calculations using the codes EMPIRE and TALYS are usually performed on a wide energy range for the measured data as well as for the data reported in literature. Many experimental data of these measurements have been published and are available in the Experimental Nuclear Reaction Data library (EXFOR), providing important constraints to subsequent evaluations.
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An overview of the above-mentioned fission and activation measurements at this facility will be presented and discussed.
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| Session | Microscopic and Integral Measurements |
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