Bulg. J. Phys. vol.21 no.1-2 (1994), pp. 008-017

Analytical Model of Neutron Resonance Cross Sections in the Unresolved Energy Region

T. Jordanov, A. Lukyanov
Faculty of Physics, University of Sofia, J. Bourchier Blvd, Sofia 1126
Abstract. For the case of identical and equidistantly distributed compound resonance some useful formulae for the resonance cross sections as periodical functions of energy are constructed. The application of these formulae in different averaged over resonances functionals of cross sections, which are of practical interest, leads to simple analytical dependencies on average resonance parameters. The model allows estimation of effects of the resonance self-shielding in reactors in the unresolved resonance region for nonfissionable nuclei.

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