Absolute /sup 235/U, /sup 238/U, /sup 237/Np fast neutron fission cross-section measurements. [14. 8 MeV and /sup 252/CF fission spectrum]

The fission cross sections of /sup 235/U, /sup 238/U and /sup 237/Np for /sup 252/Cf fission spectrum neutrons and 14.8-MeV neutrons were measured absolutely. The fission fragment--associated particle coincidence method was used. Measurement accuracy is better than 2 percent. Error sources are discussed. 3 figures, 3 tables.