论文标题
Francium 207-213的核磁矩从精密性超精美比较中
Nuclear magnetic moments of francium 207-213 from precision hyperfine comparisons
论文作者
论文摘要
我们报告说，确定Francium-207--213的中子缺陷同位素的核磁矩的确定方面有四倍的改善，将大多数同位素的不确定性从2％降低到0.5％。通过比较我们对具有实验值的基础状态的高精细结构常数的高精度计算来找到这些。特别是，我们表明了对Bohr-Weisskopf效应的仔细建模的重要性，这是由于有限的核磁化分布而产生的。这种效果在FR中特别大，到目前为止尚未以足够高的精度进行建模。对核磁矩和Bohr-Weisskopf效应的改进理解对于在标准模型的精确测试中基于原子能测试，特别是原子偶然违规研究（尤其是原子量违规研究）至关重要。
We report a fourfold improvement in the determination of nuclear magnetic moments for neutron-deficient isotopes of francium-207--213, reducing the uncertainties from 2% for most isotopes to 0.5%. These are found by comparing our high-precision calculations of hyperfine structure constants for the ground states with experimental values. In particular, we show the importance of a careful modeling of the Bohr-Weisskopf effect, which arises due to the finite nuclear magnetization distribution. This effect is particularly large in Fr and until now has not been modeled with sufficiently high accuracy. An improved understanding of the nuclear magnetic moments and Bohr-Weisskopf effect are crucial for benchmarking the atomic theory required in precision tests of the standard model, in particular atomic parity violation studies, that are underway in francium.
