Energy Levels of Strongly Interacting Ion Pairs

  • R. Parrot


The basic interactions for ion pairs are reviewed and summarized. The most important coupling mechanisms for two electron — two center and for N — electron two-center systems are treated first. In particular, a detailed study of the direct exchange will be used to define and discuss the general form of the exchange hamiltonian and to define the conventional exchange constants. Since in most cases the pair interactions can hardly be evaluated from first principles, the symmetry of the interaction hamiltonians will be discussed in order to define spin hamiltonians and effective spin hamiltonians which are of common use in describing pair spectra in the fundamental as well as in the excited states of rare earth pairs. Finally, the results obtained for several rare earth pairs and iron group ion pairs are reviewed.


Isotropic Exchange Exchange Constant Direct Exchange Tensor Operator Effective Spin 
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Copyright information

© Plenum Press, New York 1978

Authors and Affiliations

  • R. Parrot
    • 1
  1. 1.Laboratoire de Luminescence IIUniversité Paris VIParis Cedex 05France

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