For neutron with energy 0.025 eV, the values of the total scattering cross-section osc and the absorption cross-section oabs for atoms of nitrogen and oxygen are: o (barns) Osc Oabs Nitrogen 11.5 1.8 Oxygen 4.2 -0 Estimate the attenuation of a beam of neutrons of 0.025 eV in 1 m of dry air at a temperature of 20° C and and atmospheric pressure. The concentration ratio of OXygen/nitrogen is 20%/80%.

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