Breit-Wigner 1936 (Phys. Rev. 49:519) derived the energy-dependent cross-section for a reaction proceeding through an isolated compound-nucleus resonance. Single-level form: σ(E) = (π/k²)·(2J+1)/[(2s_1+1)(2s_2+1)]·Γ_in·Γ_out / [(E − E_r)²…
Breit-Wigner 1936 (Phys. Rev. 49:519) derived the energy-dependent cross-section for a reaction proceeding through an isolated compound-nucleus resonance. Single-level form: σ(E) = (π/k²)·(2J+1)/[(2s_1+1)(2s_2+1)]·Γ_in·Γ_out / [(E − E_r)²…