Abstract
The treatment of the theory of hyperfine interactions beginning initially from a relativistic viewpoint yields a number of results which differ from those of the non- relativistic approach. For both dipole and quadrupole interactions, one finds the necessity for different <r-3> values for each in the terms of the Hamiltonian. In the magnetic dipole case, an additional term is present which has the appearance of a core polarization contribution to the hyperfine field, although it arises strictly from the open shell electrons. In the electric quadrupole case, two additional interactions appear which have no non-relativistic analogue. The relativistic approach will be briefly summarized and applications to the lanthanide and actinide series reviewed. Of particular interest will be the consideration of experimental values of <r-3> and of core polarization fields.
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Dunlap, B.D. (1971). Relativistic Effects in Hyperfine Interactions. In: Gruverman, I.J. (eds) Mössbauer Effect Methodology. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-9002-6_7
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DOI: https://doi.org/10.1007/978-1-4615-9002-6_7
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