Regular Article - Experimental Physics
Measurement of the Th(n,f) cross section with quasi-monoenergetic neutron beams in the energy range 2–18 MeV
Department of Physics, National Technical University of Athens, Zografou Campus, Athens, Greece
2 European Organisation for Nuclear Research (CERN), Geneva, Switzerland
3 Tandem Accelerator Laboratory, Institute of Nuclear and Particle Physics, N.C.S.R. “Demokritos”, Aghia Paraskevi, Athens, Greece
4 University of Ioannina, Department of Physics, Ioannina, Greece
5 Institute of Nuclear and Radiological Sciences, Technology, Energy and Safety, N.C.S.R. “Demokritos”, Aghia Paraskevi, Athens, Greece
6 Institute of Nanoscience and Nanotechnology, N.C.S.R. “Demokritos”, Aghia Paraskevi, Athens, Greece
Accepted: 16 September 2021
Published online: 27 September 2021
The fission cross section of Th has been measured at fast neutron energies, using a setup based on Micromegas detectors. The experiment was performed at the 5.5 MV Van de Graaff Tandem accelerator in the neutron beam facility of the National Centre for Scientific Research “Demokritos”. The quasi-monoenergetic neutron beams were produced via the H(p,n), H(d,n) and H(d,n) reactions, while the U(n,f) and U(n,f) reactions were used as references, in order to acquire cross-section data points in the energy range 2–18 MeV. The characterization of the actinide samples was performed via -spectroscopy with a Silicon Surface Barrier (SSB) detector, while Monte Carlo simulations with the FLUKA code were used to achieve the deconvolution of the Th peak from the background of its daughter nuclei present in the spectrum. Special attention was given to the study of the parasitic neutrons present in the experimental area, produced via charged particle reactions induced by the particle beam and from neutron scattering. Details on the data analysis and results are presented.
© The Author(s) 2021. corrected publication 2021
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.