The polarizabilities of the low lying states of the Mg+ and Ca+ ions are evaluated by diagonalizing the semi-empirical Hamiltonians in a large dimension single electron basis. The quadrupole moment of the metastable 3d state Ca+ is also calculated and is within 1% of a recent experimental value while being 5% smaller than some large ab-initio calculations. In addition, the long range dispersion coefficients for these ions interacting with a number of atoms are given. Oscillator strengths are also given and generally agree with the most sophisticated ab-initio calculations. The polarizabilities and dispersion coefficients can be used to estimate the frequency shifts of the Ca+ 4s ? 3d clock transition due to background electric fields and also collisions with a buffer gas. � 2007 EDP Sciences/Societ�taliana di Fisica/Springer-Verlag.
|Number of pages||10|
|Journal||European Physical Journal D|
|Publication status||Published - 2008|