Isotope Shift Calculations of Stable and Short-Lived Beryllium Isotopes

The isotope shifts of the 2s^{2 1}S₀ to 2s2p ¹P₁ and ³P₁ transitions in the four-electron beryllium atom are calculated by using the multi-configuration Dirac–Hartree–Fock method and the relativistic configuration interaction approach for the stable and short-lived beryllium isotopes. The results provided herein can be employed for the consistency check with the nuclear rms charge radii from the experimental isotope shifts by using the corresponding transitions for the short-lived nuclei ^7,10-12Be and ¹⁴Be. The analogous isotope shift results could also be obtained for the beryllium-like ions by the methods used here.