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Be-7，9，10和单中子晕核Be-11的电荷半径

Nuclear Charge Radii of Be-7,9,10 and the one-neutron halo nucleus Be-11

W. Nörtershäuser, D. Tiedemann, M. Žáková, Z. Andjelkovic, K. Blaum, M. L. Bissell, R. Cazan, G. W. F. Drake, Ch. Geppert, M. Kowalska, J. Krämer, A. Krieger, R… 展开作者

W. Nörtershäuser, D. Tiedemann, M. Žáková, Z. Andjelkovic, K. Blaum, M. L. Bissell, R. Cazan, G. W. F. Drake, Ch. Geppert, M. Kowalska, J. Krämer, A. Krieger, R. Neugart, R. Sánchez, F. Schmidt-Kaler, Z. -C. Yan, D. T. Yordanov, C. Zimmermann

备注：
4 pages, 2 figures calculated mass shift values have been re-evaluated with the latest mass values for the beryllium isotopes and the nuclear polarization contribution for Be-11, published by K. Pachucki et al. ater submission of our manuscript, is also included now
发表信息：
Phys.Rev.Lett.102:062503,2009
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摘要：

用高精度激光光谱法测定了$^{7,9,10,11}$ Be的核电荷半径。在$^{+}$离子束上的$2s_{1/2} \to 2p_{1/2}$跃迁中用共线激光光谱进行在线测量。共线和反共线的激光束被同时使用，使用频率梳的绝对频率测定产生了约1 MHz的同位素位移测量的准确度。结合精确计算的质量依赖的同位素位移产生核电荷半径。对于晕核$^{11}$ Be，电荷半径从$^7$ Be减小到$^{10}$ Be，然后增大。当比较我们的结果与{ \it ab initio}原子核结构计算的预测，我们发现很好的协议。另外，$^7$ Be的核磁矩被确定为$-1.3995(5)μ_{\rm N}$，并且确认了来自先前$β$ -NMR测量的$^{11}$ Be的核磁矩。

英文摘要：

Nuclear charge radii of $^{7,9,10,11}$Be have been determined by high-precision laser spectroscopy. On-line measurements were performed with collinear laser spectroscopy in the $2s_{1/2} \to 2p_{1/2}$ transition on a beam of Be$^{+}$ ions. Collinear and anticollinear laser beams were used simultaneously and the absolute frequency determination using a frequency comb yielded an accuracy in the isotope-shift measurements of about 1 MHz. Combination with accurate calculations of the mass-dependent isotope shifts yield nuclear charge radii. The charge radius decreases from $^7$Be to $^{10}$Be and then increases for the halo nucleus $^{11}$Be. When comparing our results with predictions of {\it ab initio} nuclear structure calculations we find good agreement. Additionally, the nuclear magnetic moment of $^7$Be was determined to be $-1.3995(5)μ_{\rm N}$ and that of $^{11}$Be from a previous $β$-NMR measurement was confirmed.

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