Measurement of double differential cross sections of secondary neutrons from {sup 238}U, {sup 209}Bi, Fe and {sup 9}Be around 10 MeV

Double differential cross sections of {sup 238}U, {sup 209}Bi, Fe and {sup 9}Be around 10 MeV were measured at 5 or 6 or 8 angles between 35{degrees} and 120{degrees} by means of both normal and abnormal TOF spectrometers using the d-D neutron source. The present result of {sup 9}Be was compared with existing experimental data. The data of {sup 238}U and {sup 209}Bi were compared with theoretical Durations. A good agreement was achieved.