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arXiv 1106.0187nucl-th
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有限费米系统中的配对问题。弱耦合机制

Thomas-Fermi approximation to pairing in finite Fermi systems. The weak coupling regime

X. Viñas, P. Schuck, M. Farine

摘要:

我们提出了一个新的半经典理论来描述有限费米系统中的配对。它是基于取$\hbar \to 0$,即在平均场(弱耦合)的基础上写出的带隙方程的极限。除了费米动量的位置依赖性,对力的大小依赖性也被考虑在这个理论中。沿着同位素链,量子-费米能隙平均了量子能隙所示的众所周知的拱形结构。这种结构几乎可以恢复在我们的形式,如果一些壳层的起伏包括在能级密度。我们指出,在滴水线核配对强烈减少。这一事实可以用中子星内壳中的空隙的行为来说明。

英文摘要:

We present a new semiclassical theory for describing pairing in finite Fermi systems. It is based on taking the $\hbar \to 0$, i.e. Thomas-Fermi, limit of the gap equation written in the basis of the mean field (weak coupling). In addition to the position dependence of the Fermi momentum, the size dependence of the pairing force is also taken into account in this theory. Along isotopic chains the Thomas-Fermi gaps average the well known arch structure shown by the quantal gaps. This structure can be almost recovered in our formalism if some shell fluctuations are included in the level density. We point out that at the drip line nuclear pairing is strongly reduced. This fact is illustrated with the behavior of the gap in the inner crust of neutron stars.

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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