Abstract
A theoretical evaluation of the collective excitation spectra of nucleus at large deformations is possible within the framework of the dinuclear system model, which treats the wave function of the fissioning nucleus as a superposition of a mononucleus configuration and two-cluster configurations in a dynamical way, permitting exchange of nucleons between clusters. In this work the method of calculation of the potential energy and the collective spectrum of fissioning nucleus at scission point is presented. Combining the DNS model calculations and the statistical model of fission we calculate the mass, total kinetic energy, and angular distribution of fission fragments for the neutron–induced fission of 239 Pu.
Highlights
During the last years an investigation of the cluster properties of heavy nuclei attracts more and more attention of the theoreticians and experimentalists working in nuclear physics
A theoretical evaluation of the collective excitation spectra of nucleus at large deformations is possible within the framework of the dinuclear system model, which treats the wave function of the fissioning nucleus as a superposition of a mononucleus configuration and two-cluster configurations in a dynamical way, permitting exchange of nucleons between clusters
The first indications of an existence of sufficiently long living cluster-type configurations in heavy nuclear systems have been found in deep inelastic heavy ion collisions [1]. These cluster configurations composed of two touching fragments were called dinuclear systems (DNS)
Summary
During the last years an investigation of the cluster properties of heavy nuclei attracts more and more attention of the theoreticians and experimentalists working in nuclear physics. The cluster degrees of freedom play an important role in the fission process It was shown, that the fissioning nucleus at the late stages of fission just before the separation of two primary fragments can be considered as a system of two interacting clusters [3]. That the fissioning nucleus at the late stages of fission just before the separation of two primary fragments can be considered as a system of two interacting clusters [3] This consideration has been used to calculate mass, total kinetic energy and angular momentum distributions of fission fragments in neutron induced and spontaneous fission of actinides [3, 4]. In the present work we discuss the application of the DNS model to fission process and apply the model to calculate mass distribution, mean value of total kinetic energy and angular anisotropy of the fragments produced in neutron–induced fission of 239Pu
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