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arXiv 1202.0516nucl-thnucl-ex
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超球谐方法计算~ 6 He的物质和电荷半径

Matter and charge radius of 6He in the hyperspherical-harmonics approach

S. Bacca, N. Barnea, A. Schwenk

摘要:

采用基于手征有效场论势的两体低动量相互作用,从头计算了双中子晕核6 He的结合能和半径.计算是通过一个超球谐函数展开,其中的收敛速度加快,引入一个有效的相互作用的非本地潜力。后者是必不可少的,以达到一个令人满意的收敛扩展的物质半径和点质子半径。的分辨率尺度上的结果的依赖关系进行了研究。的半径和两个中子的分离能之间的相关性。通过与实验结果的比较,指出了三核子力的重要性。

英文摘要:

We present ab-initio calculations of the binding energy and radii of the two-neutron halo nucleus 6He using two-body low-momentum interactions based on chiral effective field theory potentials. Calculations are performed via a hyperspherical harmonics expansion where the convergence is sped up introducing an effective interaction for non-local potentials. The latter is essential to reach a satisfactory convergence of the extended matter radius and of the point-proton radius. The dependence of the results on the resolution scale is studied. A correlation is found between the radii and the two-neutron separation energy. The importance of three-nucleon forces is pointed out comparing our results and previous calculations to experiment.

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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