Abslract. Neutron differential elastic-and inelastic-scattering cross sections of '"Rh are measured for incident energies of -1.5 to IOMeV. The measurements are made with sufficient detail to well define the energy-averaged behaviour of the elastic-scattering process. Neutrons corresponding to excitations of groups of levels at 3 3 4 i 13, 5 3 6 i IO, 648 i 25, 796 i 20, 864 f 22, 1120 i 22, 1279 i 60, 1481 i 27 and 1683 f 39 keV aTe observed and the corresponding cross sections determined. Assuming the target nucleus is reasonably approximated by a simple one-phonon vibrator, spherical-optical,dispersive-optical, and coupled-channels models are deduced from the data base. Physical aspects of these models are compared with theoretical predictions and the sptematics of similar model parametrizations in this mass-energy region.
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