Kerr dispersion in alkali metal vapours

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Abstract
The molecular (molar) Kerr constant m K for monatomic lithium and sodium vapours in the region of some of their most interesting electronic transitions is expressed in terms of transition dipole moment matrix components. Numerical values of these components allow estimates of m K to be made for both allowed and forbidden transitions. Particular care, however, is needed in the choice of atomic wave functions if the relevant hyperpplarizabilities are to be even approximately correct. A consideration of orders of magnitude suggests that experiments to test these calculated m K values should be feasible.

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