Abstract
Low-energy prompt γ-ray spectra in the range 95–670 keV have been measured for forty-one 235U neutron resonances selected by time-of-flight in the neutron energy range 1.5–58 eV. Discrimination against the natural γ-activity of 235U has been obtained by means of a coincidence technique. The spectra show a very complicated structure owing to a few capture and many fission γ-rays. The ratios of the intensities of the 160.3 keV and 642.4 keV capture γ-rays have been used for spin assignments of fourteen resonances with small fission widths. Some conclusions are drawn about the spin dependence of average fission widths, anisotropy of fission fragments and symmetric fission yields.
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