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A Microscopic Transport Model for Synthesis of Superheavy Nuclei

机译：超核核的合成微观传输模型

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Isospin dependent molecular dynamics model has been used successfully for studying isospin effects of heavy ion collisions at intermediate energies. However, there are problems with this model for studying nuclear fusion at low energies near Coulomb barrier, such as unphysical nucleon emissions in the process of projectile and target approaching, lack of shell effect, etc. We improve the isospin dependent molecular dynamics model from various aspects for studying the dynamical process for synthesis of superheavy nuclei at low energies. The shell correction energy of the system is calculated by using deformed two-center shell model. The surface energy of the system is improved by introducing a switch function that combines the surface energies of projectile and target with the one of the compound nucleus. For reaction systems induced by of ~(16)O and ~(40,48)C at low energies near Coulomb barrier, it is found that the calculated fusion cross sections show a strong enhancement for the neutron-rich combinations, which can regenerate the experimental data quantitatively. For heavy systems such as ~(48)Ca+~(208)Pb and ~(48)Ca+~(238)U, preliminary calculations show that the experimental capture cross sections can be reproduced quanlitively. This model could pave a way for realistic predication of cross sections for synthesis of superhavey nuclei for different projectile-target systems at low energies near Coulomb barrier in future experiments.
机译：依赖于旋转源分子动力学模型已成功用于研究中间能量的重离子碰撞的异位效应。然而，这种模型存在问题，用于在库仑屏障附近的低能量下学习核聚变，例如射弹和目标过程中的未经理核磁排放，缺乏壳种等。我们改善了各种各样的依赖旋转旋转依赖性分子动力学模型用于研究低能量在低能量下合成过度核的动态过程的方面。通过使用变形的双中心壳模型来计算系统的壳校正能量。通过引入将射弹和靶与化合物核之一结合的开关功能来改善系统的表面能。对于由〜（16）o和〜（40,48）C诱导的反应系统，在库仑屏障附近的低能量下，发现计算出的融合横截面显示出富含中子组合的强大增强，这可以再生实验数据定量。对于〜（48）Ca +〜（208）Pb和〜（48）Ca +〜（238）U，初步计算显示实验捕获横截面可以是QuanLitive再现的。该模型可以铺平方法，以便在未来实验中为库仑屏障附近的不同射弹靶系统合成超野性核的横截面的现实预测。

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