Abstract
The aspect of conservation of spin polarization in electric-dipole transitions is addressed for hydrogenic ions in a nonrelativistic time-dependent perturbation theory. The results show that for direct transitions the polarization is highly conserved. The depolarizing influence of the spin-orbit interaction on the initial spin orientation is only of the order of (\ensuremath{\alpha}Z${)}^{2}$ or less for hydrogenic ions.
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