Li-9，Li-11：晕中子的核电荷半径：晕中子的影响
Nuclear Charge Radius of Li-9, Li-11: Halo Neutron: the influence of Halo Neutrons
摘要：
首次用高精度激光光谱法测定了Li-11的核电荷半径。在TRIUMF-ISAC的在线测量中，对于无多普勒的2s - 3s跃迁，Li-7 - Li-11同位素位移（IS）为25101.23（13）MHz。所有其他结合锂同位素的IS精度也得到了提高。与计算的基于质量的IS产率值的差异，用于沿同位素链的电荷半径变化。电荷半径从Li-6到Li-9单调减小，然后对于Li-11从2.217（35）fm增加到2.467（37）fm。这是比较各种模型，它被发现，晕中子相关性和内在的核心激发的组合最好地再现实验结果。
英文摘要：
The nuclear charge radius of Li-11 has been determined for the first time by high precision laser spectroscopy. On-line measurements at TRIUMF-ISAC yielded a Li-7 - Li-11 isotope shift (IS) of 25101.23(13) MHz for the Doppler-free 2s - 3s transition. IS precision for all other bound Li isotopes was also improved. Differences from calculated mass-based IS yield values for change in charge radius along the isotope chain. The charge radius decreases monotonically from Li-6 to Li-9, and then increases from 2.217(35) fm to 2.467(37) fm for Li-11. This is compared to various models, and it is found that a combination of halo neutron correlation and intrinsic core excitation best reproduces the experimental results.
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