We compute the charge radii of even-mass neon and magnesium isotopes from neutron number N = 8 to the dripline. Our calculations are based on nucleon-nucleon and three-nucleon potentials from chiral effective field theory that include delta isobars. These potentials yield an accurate saturation point and symmetry energy of nuclear matter. We use the coupled-cluster method and start from an axially symmetric reference state. Binding energies and two-neutron separation energies largely agree with data and the dripline in neon is accurate. The computed charge radii have an estimated uncertainty of about 2-3% and are accurate for many isotopes where data exist. Finer details such as isotope shifts, however, are not accurately reproduced. Chiral potentials correctly yield the subshell closure at N = 14 and also a decrease in charge radii at N = 8 (observed in neon and predicted for magnesium). They yield a continued increase of charge radii as neutrons are added beyond N = 14 yet underestimate the large increase at N = 20 in magnesium.

中文翻译：

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奇异氖和镁同位素的电荷半径

我们计算从中子数 N = 8 到滴线的偶质量氖和镁同位素的电荷半径。我们的计算基于来自手性有效场理论的核子-核子和三核子势，包括 delta 等压线。这些势能产生准确的饱和点和核物质的对称能量。我们使用耦合簇方法并从轴对称参考状态开始。结合能和双中子分离能与数据基本一致，氖中的滴线是准确的。计算出的电荷半径具有大约 2-3% 的估计不确定性，并且对于存在数据的许多同位素来说是准确的。然而，同位素变化等更精细的细节无法准确再现。手性电位正确地产生 N = 14 处的亚壳闭合，以及 N = 8 处电荷半径的减小（在氖中观察到并预测为镁）。当添加超过 N = 14 的中子时，它们会产生电荷半径的持续增加，但低估了 N = 20 时镁中的大量增加。