Abstract
Elastic and inelastic neutron scattering and neutron emission at 7 MeV incident energy has been studied for monoisotopic samples of 27Al, 93Nb and 209Bi. Time-of-flight spectra were taken at nine angles between 30° and 140° using the beam-swinger spectrometer. The efficiency of the neutron detectors was maximized using a dynamic bias; low background was obtained throughout the neutron energy detected which correspond to about 6 MeV excitation energy. The data were converted to energy spectra and corrected for sample attenuation, finite geometry and multiple scattering. For unresolved states the data were averaged over 0.5 MeV energy bins. Calculations for elastic and inelastic transitions and for compound and precompound processes are presented.
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