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In the present work, the measurement of the  236 U(n,f) cross section was performed, with reference to the  238 U(n,f) reaction. The measurements took place at the neutron beam facility of the National Centre for Scientific Research "Demokritos" (Greece) and the quasi-monoenergetic neutron beams were produced via the  2 H(d,n) 3 He reaction in the energy range 4–10 MeV. Five actinide targets (two  236 U, two  238 U and one  235 U) and the corresponding Micromegas detectors for the detection of the fission fragments were used. Detailed Monte Carlo simulations were performed, on one hand for the study of the neutron flux and energy distribution at the position of each target, and on the other hand for the study of the energy deposition of the fission fragments in the active volume of the detector. The mass and homogeneity of the actinide targets were experimentally determined via alpha spectroscopy and the Rutherford Backscattering Spectrometry, respectively. The experimental procedure, the analysis, the methodology implemented to correct for the presence of parasitic neutrons and the cross section results will be presented and discussed.

Measurement of the 236U(n,f) cross section at fast neutron energies with Micromegas Detectors

Measurement of the ²³⁶U(n,f) cross section at fast neutron energies with Micromegas Detectors