The 230U yield in the direct reactions 232Th(3He, 5n)230U and 232Th(4He, 6n)230U on thick ThO2 targets irradiated by 65 and 55 MeV nuclei 3,4He was measured and compared with calculations. The experimental yield of 230U in the reaction 232Th(3He, 5n)230U is approximately 10 times higher than the value computed using the constants from TENDL-2019. The experimental yield of 230U in the reaction 232Th(4He, 6n)230U the same, to within t5he limits of error, as the computed value. Comparing the experimental and computed yield in the reaction 232Th(4He, 6n)230U with the cross section obtained by the ALICA program (USA) showed that the computed cross section is incorrect and the prognoses for 230U production based on it are unsubstantiated. It is concluded that the reactions 232Th(3He, 5n)230U and 232Th(4He, 6n)230U are inefficient for 230U production in the U-150 cyclotron at the NRC Kurchatov Institute in amounts required for clinical applications.
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Translated from Atomnaya Énergiya, Vol. 132, No. 5, pp. 279–282, May, 2022.
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Smirnov, A.A., German, M.N., Zagryadsky, V.A. et al. 230U Yield Measurement on 3,4He-Irradiated ThO2 Targets. At Energy 132, 294–297 (2022). https://doi.org/10.1007/s10512-023-00952-1
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DOI: https://doi.org/10.1007/s10512-023-00952-1