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arXiv 1301.5552nucl-th
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$^{132}$ Sn+ PDMATHAAB Ca与$^{132}$ Sn+ $^{48}$ Ca中屏障下融合增强的显微镜分析

Microscopic analysis of sub-barrier fusion enhancement in $^{132}$Sn+$^{40}$Ca vs. $^{132}$Sn+$^{48}$Ca}

V. E. Oberacker, A. S. Umar

摘要:

我们提供了一个理论分析,最近测量的融合截面显示出令人惊讶的增强,在低$E_\mathrm{c.m.}$能量的系统$^{132}$ Sn + $^{40}$钙相比,更富中子的系统$^{132}$ Sn + $^{48}$钙。用含时密度约束密度泛函理论对三维晶格进行了动态微观计算。没有可调参数,唯一的输入是Skyrme有效NN相互作用。重离子势$V(R)$,坐标相关的质量参数$M(R)$,和总融合截面$σ(E_\mathrm{c.m.})$计算两个系统。我们能够解释测量到的融合增强的{ \it较窄的宽度}的离子-离子电位为$^{132}$ Sn+ $^{40}$ Ca,而势垒的高度和位置是近似相同的两个系统。

英文摘要:

We provide a theoretical analysis of recently measured fusion cross sections which show a surprising enhancement at low $E_\mathrm{c.m.}$ energies for the system $^{132}$Sn+$^{40}$Ca as compared to the more neutron-rich system $^{132}$Sn+$^{48}$Ca. Dynamic microscopic calculations are carried out on a three-dimensional lattice with a time-dependent density-constrained density functional theory. There are no adjustable parameters, the only input is the Skyrme effective NN interaction. Heavy-ion potentials $V(R)$, coordinate-dependent mass parameters $M(R)$, and total fusion cross sections $σ(E_\mathrm{c.m.})$ are calculated for both systems. We are able to explain the measured fusion enhancement in terms of the {\it narrower width} of the ion-ion potential for $^{132}$Sn+$^{40}$Ca, while the barrier heights and positions are approximately the same in both systems.

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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