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arXiv 1609.08698nucl-th
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核聚变对同位旋动力学的依赖性

Dependence of fusion on isospin dynamics

K. Godbey, A. S. Umar, C. Simenel

摘要:

我们介绍了一种新的微观方法来计算的依赖性的熔合势垒和横截面的同位旋动力学。该方法基于含时Hartree-Fock理论和能量密度泛函(EDF)的等幅和等矢量性质。计算了EDF的等压线和等矢量线对熔合势垒的贡献。结果表明,对于非对称系统的等矢量动力学影响的亚势垒融合截面。对于大多数系统,这导致子势垒横截面的增强,而对于其他系统,我们观察到不同程度的阻碍。我们使用这种方法来提供一个解释最近测得的融合横截面显示出令人惊讶的增强,在低$E_\mathrm{c.m.}$能量的系统$^{40}$钙+ $^{132}$锡相比,更富中子的系统$^{48}$钙+$^{132}$锡,并讨论了依赖于转移的子势垒融合横截面。

英文摘要:

We introduce a new microscopic approach to calculate the dependence of fusion barriers and cross-sections on isospin dynamics. The method is based on the time-dependent Hartree-Fock theory and the isoscalar and isovector properties of the energy density functional (EDF). The contribution to the fusion barriers originating from the isoscalar and isovector parts of the EDF is calculated. It is shown that for non-symmetric systems the isovector dynamics influence the sub-barrier fusion cross-sections. For most systems this results in an enhancement of the sub-barrier cross-sections, while for others we observe differing degrees of hindrance. We use this approach to provide an explanation of recently measured fusion cross sections which show a surprising enhancement at low $E_\mathrm{c.m.}$ energies for the system $^{40}$Ca+$^{132}$Sn as compared to the more neutron-rich system $^{48}$Ca+$^{132}$Sn, and discuss the dependence of sub-barrier fusion cross-sections on transfer.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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