A.V. Andreev

Description of light charged particle emission in ternary fission

We consider the motion of three fragments starting from the scission point of ternary system. In the alpha‐accompanied ternary fission the initial conditions are not the free parameters and determined by minimization of potential energy at scission point. In the trajectory calculations the angular distribution and mean value of the kinetic energy of the alpha‐particles are well described in the spontaneous ternary fission of 252Cf. In the Be‐ and C‐accompanied ternary fission we found that the emission of the third particle occurs from one of the heavy fragments after their separation.

Cluster aspects of binary and ternary fission

On the basis of the statistical approach and calculation of the potential energy of the scission configurations, binary and ternary fissions are described.

Effects of nuclear deformation in dinuclear systems : Application to the fission process

The relative yields of fission fragments, the mean values of their total kinetic energy, and the variances of their distributions with respect to the total kinetic energy are described within the improved scission-point model. It is shown that, for fixed charge and mass numbers of fragments, the potential energy of the prescission configuration as a function of the deformation parameters of the fragments has several minima. The scission at these minima leads to a relative enhancement of the yields of the fragments that have the corresponding values of the total kinetic energy and to the appearance of a fine structure in the mass-energy distribution, this structure being different from that induced by the even-odd effect.

Fine Structures by Deformation in the Mass-Energy Distribution of Fission Fragments

It is shown within a seission point model that for a fixed mass and charge fragmentation the potential energy of the scission configuration has several minima as a function of the deformation parameters of the fragments. The scission at these minima leads to a relatively enhanced yield of the fragments with a certain TKE and creates fine structures in the TKE-mass distribution which are different from those produced by the odd-even effect.