Dynamical restriction for a growing neck due to mass parameters in a dinuclear system

Details Dynamical restriction for a growing neck due to mass parameters in a dinuclear system Dynamical restriction for a growing neck due to mass parameters in a dinuclear system

1999-11-02

arxiv.org/abs/nucl-th/9911007v1

Nucl.Phys. A671 (2000) 233-254

Physics

Nuclear Physics

Nuclear Theory

22 pages, 7 figures, submitted to Nucl.Phys.A

Scientific paper

10.1016/S0375-9474(99)00852-0

Mass parameters for collective variables of a dinuclear system and strongly deformed mononucleus are microscopically formulated with the linear response theory making use of the width of single particle states and the fluctuation-dissipation theorem. For the relative motion of the nuclei and for the degree of freedom describing the neck between the nuclei, we calculate mass parameters with basis states of the adiabatic and diabatic two-center shell model. Microscopical mass parameters are found larger than the ones obtained with the hydrodynamical model and give a strong hindrance for a melting of the dinuclear system along the internuclear distance into a compound system. Therefore, the dinuclear system lives a long time enough comparable to the reaction time for fusion by nucleon transfer. Consequences of this effect for the complete fusion process are discussed.

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