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arXiv 0709.1310nucl-ex
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晕核中的配对关联

Pairing Correlations in halo Nuclei

H. Sagawa, K. Hagino

摘要:

本文用密度依赖接触作用的三体模型研究了弱束缚晕核$^{6}$ He和$^{11}$ Li的配对关联。研究了Borromean核$^{11}$ Li中双中子波函数的空间结构,通过计算核心核$^9$ Li到两个中子的质心不同距离处的双中子波函数,模拟了不同密度下中子对的行为.用这种表示法定量地确定了富中子核表面中子对的强浓度。偶极激发在$^{6}$他和$^{11}$李也研究在同一三体模型,并与实验数据进行比较。由B(E1)求和规则和均方根质量半径经验性地提取了来自核心的两个中子之间的小开角,表明晕核中强的双中子相关。

英文摘要:

Paring correlations in weakly bound halo nuclei $^{6}$He and $^{11}$Li are studied by using a three-body model with a density-dependent contact interaction. We investigate the spatial structure of two-neutron wave function in a Borromean nucleus $^{11}$Li.The behavior of the neutron pair at different densities is simulated by calculating the two-neutron wave function at several distances between the core nucleus $^9$Li and the center of mass of the two neutrons. With this representation, a strong concentration of the neutron pair on the nuclear surface is quantitatively established for neutron-rich nuclei. Dipole excitations in $^{6}$He and $^{11}$Li are also studied within the same three-body model and compared with experimental data. The small open angles between the two neutrons from the core are extracted empirically by the B(E1) sum rule together with the rms mass radii, indicating the strong di-neutron correlation in the halo nuclei.

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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