Neutron Resonance Spectroscopy in Natural Copper

Abstract

High resolution measurements of the total neutron cross section from 200 eV to ∼50 keV in natural copper have been performed using time-of-flight techniques. From the R-matrix analysis of the data, values of E0, Γn, Jπ of resonances, strength functions, and average level spacings are obtained. For in units of eV−1/2 were obtained. Similarly, the average level spacings are determined for 63Cu〈D〉 J = 1 = (2.38 ± 0.38) keV, 〈D〉J = 2 = (3.57 ± 0.70) keV and for 65Cu〈D〉J = 1 = (3.85 ± 0.88) keV and 〈D〉J = 2 = (5.0 ± 1.2) keV.