Serban Misicu
Semi-microscopical description of the scission configuration in the neutronless fission of 252Cf
S. Misicu1 - Ph. Quentin2
1 National Institute for Physics and Nuclear Engineering, Bucharest-Magurele, P.O.B. MG-6,
Romania
(misicu@theor1.theory.nipne.ro)
2 Centre d'Etudes Nucléaires de Bordeaux-Gradignan, Université Bordeaux I and IN2P3/CNRS,
France
(quentin@cenbg.in2p3.fr)
Received: 24 September 1999 Communicated by B. Povh
Abstract
The neutronless fission of 252Cf is studied in the frame of a
molecular model in which the scission configuration is described by two
aligned fragments interacting by means of Coulomb (+ nuclear) forces. The study
is carried out for different distances between the fragments tips and
excitation energies. For a given deformation, the fragment's total energy
is computed via the constrained Hartree-Fock + BCS formalism.
The total excitation energy present in the fragments is supposed
to contribute only to the fragments deformation and the asymptotic
value of the kinetic energy is equated to the inter-fragment potential
at scission. These two constraints are yielding a few fission
channels for a fixed tip distance and excitation energy. Discarding 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.
PACS
21.60 Gx Cluster models -
21.60.Jz Hartree-Fock and random-phase approximations -
24.75.+i General properties of fission -
25.85.Ca Spontaneous fission
Copyright Springer-Verlag
