Two different modes associated with the composite nucleus- the charge and mass distributions for exotic nuclear synthesis -

Yoritaka Iwata ,N Itagaki,J A Maruhn ,Takaharu Otsuka

doi:10.1051/epjconf/20100213002

Abstract

The mass-dependent structure of the composite nucleus is shown based on three-dimensional timedependent Hartree-Fock calculations with Skyrme interactions (SLy4d and SkM*). One remarkable result is that the isovector monopole excitation dominantly appears for collisions of heavy nuclei, and the isovector dipole excitation for those of light ones. Such a difference found in the dynamical structure of composite nucleus plays a role in the equilibration of charge.

Highlights

24Mg + O 24 (SLy4d)If one wants to have a synthesis of a nucleus with a certain 4.5 x10-22 s 6.0 x10 s7.5 x10-22 s charge and mass, it is necessary to find factors to control charge and mass distributions of final fragments
Charge equilibration naturally prevents the synthesis of exotic nuclei with extreme proton-neutron asymmetry, its appearance is ditime rectly connected with the N/Z ratios of the final fragments
In this paper we focus on the massdependent dynamics of collisions

Summary

Introduction

7.5 x10-22 s charge and mass, it is necessary to find factors to control charge and mass distributions of final fragments. 10 fm clear synthesis towards the neutron/proton driplines is one of the most interesting issues as for clarifying the existencetime limit of elements In this context, the ultimate goal is to obtain the control theory of nuclear synthesis from the view of collision dynamics. The Skyrme TDHF with SLy4d parametrization is shown in the upper panel, and that with SkM* parametrization in the lower panel.

Two isovector modes

Pattern of fragmentation

Formation of jet

Conclusion