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INVESTIGATION OF PU-239 TRANSMUTATION FOR ACCELERATOR DRIVEN SUBCRITICAL REACTORS
Tanchak, Anhelina ; Parlag,, Oleg (oponent) ; Krása, Antonín (oponent) ; Nečas, Vladimír (oponent) ; Katovský, Karel (vedoucí práce)
This dissertation thesis is focused on determination of cross sections of radionuclides generated in result of spallation reaction in plutonium (239PuO2) target irradiated by 660 MeV energy proton beam. Moreover, the produced nuclides were also investigated using different tools to ascertain their properties. The Phasotron accelerator of the Joint Institute for Nuclear Research (Dubna) was used for irradiation of target as a generator of proton beam. The experiment was focused on the quest for short-lived radionuclides. The HPGe detectors were used for measurement of gamma spectra. The -spectra obtained during this experiment were processed using the DEIMOS32 software. The AD4HEL code was used for identification of the nuclei formed in the 239PuO2 target. The comprehensive analysis of these residual products and their characteristics, serve as an important contribution to the understanding of the spallation and fission reactions between protons and 239Pu in high-energy range. Additionally, the experimental data of the nuclear reaction cross sections may be valuable as reference data for theoretical simulations to study reactions, and they can be used for supplementation to the nuclear databases. As for comprehensive analysis, the experimental results were compared with simulations conducted using Monte Carlo particle transport codes, such as MCNP v.6.1. and FLUKA. As a result, received data overall correspond to the expectation having similar regions of nuclides concentrations, similar graphs, and a slight variation in the range of values (probably because of the different normalization factors of different software tools).
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