Uncertainty evaluation of the isotope shift factors for transitions in B II**Project supported by the National Natural Science Foundation of China (Grant Nos. 91436103, 11404025, and 91536106), the Research Program of National University of Defense Technology, China (Grant No. JC15-0203), and the China Postdoctoral Science Foundation (Grant No. 2014M560061).

Abstract

Accurate isotope shift factors of the transitions in B II, obtained with the multi-configuration Dirac–Hartree–Fock and the relativistic configuration interaction methods, are reported. We found a linear correlation relation between the mass shift factors and the energies for the transitions concerned, considering all-order electron correlations. This relation is important for estimating the uncertainty in the calculation of isotope shift factors. These atomic data can be used to extract the nuclear mean-square charge radii of the boron isotopes with halo structures or to resolve the high precise spectroscopy of B II in astronomical observation.