Semi-microscopical description of the scission configuration in the neutronless fission of Cf-252

The neutronless fission of Cf-252 is studied in the frame of a molecular mo del in which the scission configuration is described by two aligned fragmen ts interacting by means of Coulomb (+ nuclear) forces. The study is carried out for different distances between the fragments tips and excitation ener gies. For a given deformation, the fragment's total energy is computed via the constrained Hartree-Fock + BCS formalism. The total excitation energy p resent in the fragments is supposed to contribute only to the fragments def ormation and the asymptotic value of the kinetic energy is equated to the i nter-fragment potential at scission. These two constraints are yielding a f ew fission channels for a fixed tip distance and excitation energy. Discard ing those fission channels corresponding to a disequilibrium in the sharing of the excitation energy between the two fragments, we establish the most likely scission configurations for a specified excitation energy.