The Total Neutron Cross Section of Lithium-7 and Carbon from 100 to 1500 keV

A precise determination of the neutron total cross section of ⁷Li and carbon has been made in the energy region 100 to 1500 keV. The parameters of the prominent ⁷Li resonance in the laboratory system are E_λ = 261 keV, Γ_λ = 36.5 keV and = 594 keV. Corresponding parameters for the principal bound state resonance in carbon are E_λ = −2020 keV and = 540 keV. The carbon data are fitted by σ_T = 4.830 − 3.55E + 1.587E² − 0.305E³, where σ_T is in barns and E is in MeV. Above 500 keV the ⁷Li data are fitted by σ_T = 6.929 − 27.018E + 42.721E² − 27.210E³ + 6.139E⁴.