CARJAN, N.; RIZEA, M.

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Licencia de uso del documento

CARJAN, N.
Physique théorique [THEORIE]

RIZEA, M.
Horia Hulubei National Institute of Physics and Nuclear Engineering [NIPNE]

Idioma

Article de revue

Este ítem está publicado en

Romanian Journal of Physics. 2012, vol. 57, p. 92-105

Romanian Academy Publishing House

Resumen en inglés

We study the transition of the fissioning nucleus from the saddle to the scission point through a dynamical approach. It involves the numerical solution of the bi-dimensional time-dependent Schr¨odinger equation (TDSE) with time-dependent potential. The axially symmetric extremely deformed nuclear shapes are described by modified Cassini ovals. The Hamiltonian in cylindrical coordinates and z is discretized by using special finite difference approximations of the derivatives. The initial wave-functions for TDSE are the eigen-solutions of the stationary Schr¨odinger equation whose potential corresponds to the saddle point deformation. The TDSE is solved by a Crank-Nicolson method associated with transparent conditions at numerical boundaries. The time evolution is calculated until the neck connecting the primary fission fragments suddenly breaks. The numerical solutions have been used to evaluate relevant scission properties in the case of the fissioning nucleus 236U.< Leer menos

Palabras clave en inglés

adapted finite differences

low-energy nuclear fission

saddle-to-scission

neutrons

excitation energy

multiplicity

bi-dimensional Schr¨odinger equation

stationary

time-dependent

adapted finite differences.

Orígen

Importado de Hal

Centros de investigación

Centre d'Études Nucléaires de Bordeaux Gradignan (CENBG)