Using relativistic configuration-interaction wave functions, we have obtained length and velocity f values for all lower J=2,3,4 (4d+5s${)}^4$ levels connected to the z ${4\mathrm{d}}^3$5p ${}_{}{}^5{}_{}{}^{}\mathrm{G}_3^{\mathrm{o}}{}_{}{}^{}$, and ${}_{}{}^3{}_{}{}^{}$${\mathit{D}}_3^{\mathit{o}}$ levels. Our lifetime results for length and velocity operators are τ${(}^5$${\mathit{G}}_3^{\mathit{o}}$)=5.16 and 6.53 ns, respectively, and τ${(}^3$${\mathit{D}}_3^{\mathit{o}}$)=4.67 and 5.60 ns, respectively. These are in good agreement with the experimental values of 5.8–6.2 and 5.0 ns. As we find for hyperfine structure, the 4${\mathit{d}}^4$, 4${\mathit{d}}^3$5s interactions are important in generating accurate lifetime and f-value results.

• Received 3 April 1995

DOI:https://doi.org/10.1103/PhysRevA.52.2436