Abstract
Fast time-of-flight techniques were used to measure the differential cross sections for the elastic scattering of neutrons from natural Zr and Nb. The measurements were made at ≈ 50 keV intervals throughout the incident neutron energy range 0.3 to 1.5 MeV. In addition, the cross sections for the excitation by inelastic neutron scattering of a 0.92 MeV level in Zr and 0.74, 0.81, 0.96 and 1.08 MeV levels in Nb were measured. The results of these measurements are compared with those obtained in other experiments and with optical model calculations. Tentative spin assignments for the low lying levels in Nb 93 are made on the basis of Hauser-Feshbach calculations and shell model predictions.
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