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Long‐Range interaction coefficients between H, He + , He, and Li +
Author(s) -
Easa S. I.,
Yousif F. N.
Publication year - 1982
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.560210616
Subject(s) - multipole expansion , oscillator strength , perturbation theory (quantum mechanics) , range (aeronautics) , physics , atomic physics , quantum mechanics , fast multipole method , london dispersion force , ion , chemistry , quantum electrodynamics , molecule , van der waals force , materials science , composite material , spectral line
Using the new expression for the dynamic multipole polarizabilities in terms of effective oscillator strengths and effective transition energies derived from the variational procedure based on the total energy expansion in terms of induced multipole moments, we have calculated the long‐range dispersion force coefficients and the leading relativistic correction to the long‐range potential between H, He + , He, and Li + . We have in addition calculated the oscillator strength sum rules for the above systems. Our results are comparable with those obtained using both a hydrodynamic model to quantum mechanics and double perturbation theory.