235U(n, f) Fragment mass-, kinetic energy- and angular distributions for incident neutron energies between thermal and 6 MeV

摘要: Abstract Fission fragment energies and emission angles have been measured for 235 U(n, f) in the neutron energy range from thermal to 6 MeV steps of 0.5 MeV. The pre-neutron mass distributions were evaluated described by a five-gaussian representation. resulting parameters show sudden change their dependence between 1.5 2.0 MeV, which might be due pair breaking. From total kinetic sum deformations two fragments was evaluated. Clear proton pairing effects are visible since even-proton less deformed than neighbouring odd-proton fragments. present data confirm also that TKE averaged over all drops with excitation above 4 This behaviour is mainly drastic changes as function split. At yield level 10 −6 per light cold fragmentation observed masses 87 110. In this region prolate ground state electric quadrupole moment larger ≈1 b. angular fission showed no dependence.