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arXiv 1003.4126nucl-th
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低动量真实NN相互作用的可分离形式

Separable form of low-momentum realistic NN interaction

P. Grygorov, E. N. E. van Dalen, J. Margueron, H. Müther

摘要:

从核子-核子相互作用的实际模型导出的低动量相互作用$V_{\text{low-k}}$以可分离的形式给出。这种可分离力由接触相互作用支持,以实现对称核物质的饱和性质。在可分形式的$V_{\text{low-k}}$和接触项的两种不同参数化下,研究了核物质和有限核的体性质。讨论了Hartree-Fock计算中可分离力相对于原始相互作用$V_{\text{low-k}}$的精度。对于2 fm $^{-1}$的截止参数$Λ$,通过秩2可分离力的表示产生足够的精度,而对于较大的截止参数需要较高的秩。所得到的可分离力以简单的方式被参数化,以允许在其他原子核结构计算中容易地应用。

英文摘要:

The low-momentum interaction $V_{\text{low-k}}$ derived from realistic models of the nucleon-nucleon interaction is presented in a separable form. This separable force is supported by a contact interaction in order to achieve the saturation properties of symmetric nuclear matter. Bulk properties of nuclear matter and finite nuclei are investigated for the separable form of $V_{\text{low-k}}$ and two different parameterizations of the contact term. The accuracy of the separable force in Hartree-Fock calculations with respect to the original interaction $V_{\text{low-k}}$ is discussed. For a cutoff parameter $Λ$ of 2 fm$^{-1}$ a representation by a rank 2 separable force yields a sufficient accuracy, while higher ranks are required for larger cut-off parameters. The resulting separable force is parameterized in a simple way to allow for an easy application in other nuclear structure calculations.

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