Dynamic potential barrier in the entrance phase of heavy-ion fusion reactions

被引：9
|
作者：
Tian, J. -L. [1 ,2 ]
Li, X. [1 ]
Wu, X. -Z. [2 ]
Li, Z. -X. [2 ]
Yan, S. -W. [1 ]
机构：
[1] Beijing Normal Univ, Coll Nucl Sci & Technol, Beijing 100875, Peoples R China
[2] China Inst Atom Energy, Beijing 102413, Peoples R China
来源：
EUROPEAN PHYSICAL JOURNAL A | 2009年 / 42卷 / 01期
基金：
中国国家自然科学基金;
关键词：
COMPOUND NUCLEUS FORMATION; SUPERHEAVY ELEMENTS; MASSIVE NUCLEI; QUASI-FISSION; SHELL-MODEL; COMPETITION;
D O I：
10.1140/epja/i2009-10850-2
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Based on the improved quantum molecular-dynamics (ImQMD) model, the incident energy dependence of dynamic potential barriers is investigated in the entrance channel of fusion reactions. The height of the dynamic barrier increases with the incident energy at energies around the Coulomb barrier. The calculated lowest dynamic barrier approaches to the adiabatic barrier, while the highest one goes up to the sudden potential barrier. To understand the energy dependence of the dynamical barrier we study the neck formation and shape evolution of the system which causes the dynamic lowering of the barrier.
引用
收藏
页码：105 / 110
页数：6
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