Oct 21 – 25, 2019
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Average high energy neutron flux distribution in the Quinta sub-critical assembly irradiated with proton beam of 0.66 GeV energy applying the actinide spectral index method

Oct 24, 2019, 5:25 PM
Conference room... (CZiITT)

Conference room...


Centrum Zarządzania Innowacjami i Transferem Technologii Politechniki Warszawskiej cziitt@pw.edu.pl ul. Rektorska 4 00-614 Warszawa
MPD Collaboration Meeting NICA Technical Session


Marcin Szuta (National Centre for Nuclear Research)


The paper presents the results of investigations of nuclear-physical characteristics of neutron fields generated in a massive uranium target irradiated by deuterons with an energy of 0.66 GeV. 23 natural uranium samples spatially arranged in a sub-critical assembly Quinta (at the Joint Institute for Nuclear Research, Dubna , Russia), were irradiated with spallation neutrons. We have processed the experimental data based on gamma-ray spectrometry in order to reach (obtain) the number of neutron induced fissions and neutron captures in the detector foils. Applying the try and error method we have found that the neutron energy for which the ratio of the fission cross section to the capture cross section of the natural uranium from the nuclear data base is equal to the measured ratio of the spectral indexes. The retrieved distinct fission and capture cross sections for the distinct neutron energy from the nuclear data base describe the average values which enabled us to evaluate the average neutron flux and neutron fluency distribution in the assembly.

Primary authors

Marcin Szuta (National Centre for Nuclear Research) V.A. Voronko (National Science Center “Kharkov Institute of Physics and Technology”, Kharkov, Ukraine) V.V. Sotnikov (National Science Center “Kharkov Institute of Physics and Technology”, Kharkov, Ukraine;) ELZBIETA STRUGALSKA-GOLA (NCBJ SWIERK) Dr Marcin Bielewicz (Nacional Centre for Nuclear Research)

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