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Report No.

Neutron and proton nuclear data evaluation for $$^{235}$$U and $$^{238}$$U at energies up to 250 MeV

Konobeyev, A. Y.; Fukahori, Tokio  ; Iwamoto, Osamu  

Basic features of nuclear data evaluation for uranium isotopes $$^{235}$$U and 238U at intermediate energies are described. The coupled channel optical model was used to obtain total cross section, reaction cross section, angular distributions and transmission coefficients. The direct, pre-compound and evaporation models were used to describe neutron and charged particles emission from excited nuclei. The neutron data evaluated were combined with JENDL-3.3 data below 20 MeV to obtain a full data set in the whole energy range between 10$$^{-5}$$ eV and 250 MeV. Evaluation of the proton data has been done at energies from 1 to 250 MeV



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