RELATIVISTIC CALCULATIONS OF THE HYPERFINE INTERACTIONS IN THE EXCITED 7 P-2(3 2) AND 7 P-2(1/2) STATES OF THE RA+ ION/

The relativistic linked-cluster many-body perturbation theory (RLCMBPT ) has been used to investigate the hyperfine properties in the excited 7 P-2(3/2) and 7 P-2(1/2) states of (221)Rg(+) ions. Our calculations of the hyperfine constants. yield -22.4+/-0.3 MHz for the 7 P-2(3/2) state and -265.3+/-4.0 MHz for the 7 P-2(1/2) in state, in excellent a greement with the experimentally obtained values of -22.4+/-0.9 and -2 66.3+/-1.5 MHz, respectively. The results obtained in this work are co mpared with those by other theoretical methods and an attempt is made to understand the relationship between the different methods, particul arly that between the RLCMBPT procedure adopted in this work and the m any-body multiconfigurational Dirac-Fock procedures.