The Neutron Cross Section of Mn Below 5000 ev

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Abstract
Experimental measurements of the neutron scattering and absorption cross sections of manganese at energies less than 5000 ev are shown to fit a two-level Breit-Wigner formula. Only one parameter, the nuclear radius, need be adjusted to do this. This adjustment having been made, it is possible to obtain (a) the total scattering, the coherent scattering, and the absorption cross section for thermal neutrons, (b) the angular momenta of the two low energy resonances, and (c) the proper cross-section behavior in the wing of the lowest energy resonance. The evidence presented demonstrates in detail that the Breit-Wigner formulation yields the proper neutron scattering cross section as a function of energy.