Core-polarization studies of nuclear-Schiff-moment-induced permanent electric dipole moments of atomicXe129,Yb171, andRa225

Abstract

We have calculated the intrinsic electric dipole moments (EDMs) of $^{129}\mathrm{Xe}$, $^{171}\mathrm{Yb}$, $^{225}\mathrm{Ra}$ atoms induced by the nuclear Schiff moment (NSM). We use the coupled perturbed Hartree-Fock [CPHF] framework to perform this calculation. In this work, the effects of electron correlation on atomic EDMs are studied in CPHF framework by gradual inclusion of virtual orbitals of higher symmetries. Individual orbital contributions to the final magnitude of the EDM are presented. The results for the NSM-induced EDM for these atoms show a trend similar to the electron-nucleon tensor-pseudotensor (T-PT)-induced EDM, the study of which was performed elsewhere. This behavior can be attributed to the fact that the influence of virtual orbitals of higher symmetry on the magnitude of EDM is essentially the same for both T-PT and NSM-induced atomic EDMs. However, we also report in this paper, that the most dominant contribution to the atomic EDM of $^{129}\mathrm{Xe}$, $^{171}\mathrm{Yb}$, $^{225}\mathrm{Ra}$ atoms induced by the NSM arises from the ${s}_{1/2}\text{\ensuremath{-}}{p}_{3/2}$ pairings rather than the ${s}_{1/2}\text{\ensuremath{-}}{p}_{1/2}$ pairings, which were the dominantly contributing pairings for the electron-nucleon tensor-pseudotensor-induced atomic EDM.