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The fine- and hyperfine structure (hfs) analysis, on the basis of available experimental data for the configuration 6s26p6d+6s26p7s+6s26p8s in PbI has been performed. The Slater integrals, spin-orbit parameters and the effective hfs one-electron parameters have been determined. We find an off-diagonal core-polarization effect in the 6p6d+6p7s-space. Using the calculated radial parameters, the values of the quadrupole moment for stable and radioactive Pb-nuclei have been determined from measuredB-factors of the 6p7s3P1 state. In addition, a repulsion effect on the hfs sublevels with the same quantum numberF has been investigated.

Fine- and hyperfine structure analysis of the odd configurations in the lead atom