Question

A nucleus has a neutron resonance at 65 eV and no other resonances nearby. For this resonance, Γ_n = 4.2 eV, Γ_γ = 1.3 eV and Γ_α = 2.7 eV, and all other partial widths are negligible. Find the cross-section for (n, γ ) and (n, α) reactions at 70 eV.

Answer 1

Γ = Γ_n + Γ_γ + Γ_α = 4.2 + 1.3 + 2.7 = 8.2 eV