SUB-COULOMB TRANSFER AND FISSION IN COLLISIONS OF XE-129,XE-132 AND XE-136 WITH U-238

Integral cross sections for fission and for one- and two-neutron transfer reactions in the system132Xe+238U were measured radiochemically in the energy range 0.7≦E/ECoul≦1. The excitation functions for fission and transfer are found to be essentially parallel below 0.85×ECoul. Even at the lowest energies the transfer cross sections exceed the fission cross section by more than one order of magnitude. With the other projectiles129Xe and136Xe different transfer cross sections illustrating their sensitivity for the ground state Q-values, Qgg, are observed while the fission cross sections are the same as in the132Xe +238U reaction. The fission data are interpreted in terms of a continuous transition between Coulomb fission and several transfer-induced fission processes. © 1979 Springer-Verlag.