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arXiv 0901.0453nucl-th
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Li和Be同位素的电荷半径和电磁矩的从头算无核壳模型

Charge radii and electromagnetic moments of Li and Be isotopes from the ab initio no-core shell model

C. Forssén, E. Caurier, P. Navrátil

摘要:

最近,Li和Be同位素的电荷半径和基态电磁矩被精确测量。我们已经进行了大规模的从头算无核壳模型计算这些同位素使用高精度的核子核子势。我们计算的电荷半径和四极和磁偶极矩的同位素趋势与实验结果吻合良好,11 Li电荷半径除外。磁矩的描述特别好,而四极矩的绝对值大约小10%。6Li四极矩的小幅度被再现,并与CD-Bonn NN势,也是其正确的符号。

英文摘要:

Recently, charge radii and ground-state electromagnetic moments of Li and Be isotopes were measured precisely. We have performed large-scale ab initio no-core shell model calculations for these isotopes using high-precision nucleon-nucleon potentials. The isotopic trends of our computed charge radii and quadrupole and magnetic-dipole moments are in good agreement with experimental results with the exception of the 11Li charge radius. The magnetic moments are in particular well described, whereas the absolute magnitudes of the quadrupole moments are about 10% too small. The small magnitude of the 6Li quadrupole moment is reproduced, and with the CD-Bonn NN potential, also its correct sign.

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