The multipole polarisability of the ground state of francium is calculated by utilising both the variational technique of Davison and the quantum defect theory underlying the Bates-Damgaard method. This approach is also shown to yield reasonable results for other alkali atoms. Second-order Stark shift for the ground state of francium is presented as a function of field strength for possible future experimental comparison.

中文翻译：

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静态多极极化率和二阶斯塔克频移。

utilizing基态的多极极化率是通过利用Davison的变分技术和贝茨-达姆加德方法所基于的量子缺陷理论来计算的。对于其他碱原子，该方法也显示出合理的结果。ground基态的二阶斯塔克位移被表示为场强的函数，以便将来进行实验比较。