On the passage of a fissioning nucleus through the barrier to scission in a multidimensional diffusion model

Journal Article · Wed Oct 01 04:00:00 EDT 1986 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)

OSTI ID:6920510

Adeev, G D; Pischasov, N I

The dynamics of the motion of a fissioning nucleus from the ground state through a multidimensional potential barrier to scission is studied in a model based on the Fokker--Planck equation (FPE) for the distribution function of the collective variables. The multidimensional FPE is solved by the reduced-propagator method. The effect of the nuclear friction on the speed at which the quasistationary probability current through the saddle point is established and on the extent of the deviation of the parameters of the stationary distribution function near the top of the barrier from the corresponding equilibrium values is analyzed. The trajectories of the fissioning system and the fragment-mass-distribution variances for different modes of description of the fission dynamics, specifically for the case when the investigation of the evolution of the fissioning nucleus starts from the ground state and the case when the investigation starts from the saddle point, are compared.

• Research Organization: Omsk State University
• OSTI ID: 6920510
• Journal Information: Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 44:4; ISSN SJNCA
• Country of Publication: United States
• Language: English

Related Subjects

653006* -- Nuclear Theory-- Spontaneous & Induced Fission
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
DIFFERENTIAL EQUATIONS
DISTRIBUTION FUNCTIONS
ENERGY LEVELS
EQUATIONS
FISSION
FISSION BARRIER
FOKKER-PLANCK EQUATION
FUNCTIONS
GROUND STATES
NUCLEAR POTENTIAL
NUCLEAR REACTIONS
PARTIAL DIFFERENTIAL EQUATIONS
POTENTIALS
SADDLE-POINT METHOD