Magnetic dipole and electric quadrupole hyperfine constants for V II 3d \u3c sup\u3e 4 \u3c/sup\u3e, 3d \u3c sup\u3e 3 \u3c/sup\u3e 4s and 3d \u3c sup\u3e 2 \u3c/sup\u3e 4s \u3c sup\u3e 2 \u3c/sup\u3e J=1-5 states

© 2015 IOP Publishing Ltd. Abstract Relativistic configuration interaction (RCI) calculations have been done for hyperfine constants and Lande g-values for 69 even parity V II states. Our results are in good agreement with the few recent experimental magnetic dipole results. We suggest that several Lande g-values need to be re-measured. Our electric quadrupole constants seem to be the first ones available. Analysis and methodology improvements include the introduction of an approximate sum rule for hyperfine constants, and a way of producing a more diagonal reference basis function set. The importance of mixing of 3dn-1 4s basis members with near degenerate 3dn or 3dn-2 4s2 is emphasized