Abstract
Recently measured radiative lifetimes of the Rydberg series $6pnd\frac{1}{2}[\frac{5}{2}{]}_{2}^{o}$ and $\frac{1}{2}[\frac{3}{2}{]}_{2}^{o}$ $(n=6--13)$ of Pb I [Li et al., Phys. Rev. A 57, 3443 (1998)] have been compared with theoretical values obtained by means of multichannel quantum defect theory (MQDT) analyses. The MQDT parameters were obtained from experimentally determined energy levels. The channel admixture coefficients were calculated and used to evaluate the theoretical lifetimes. In addition, lifetime values for highly excited Rydberg states have been predicted.
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