Nuclide Cross‐Sections Of Fission Fragments In The Reaction 208Pb+p At 500 A MeV

The isotopic distributions and recoil velocities of the fission fragments produced in the spallation reaction 208Pb+p at 500 A MeV have been measured using the inverse kinematics technique. The shapes of the different distributions are found in good agreement with previously published data while the deduced total fission cross‐section is higher than expected. From the experimental data, the characteristics of the average fissioning system can be reconstructed in charge, mass and excitation energy and the number of post‐fission neutrons can be inferred. The results are also compared to different models describing the spallation reaction.