Thomas–Fermi–Dirac interaction potentials for rare gas systems

The energy components and the Thomas–Fermi–Dirac interatomic interaction potentials of the Ar–Ar, Kr–Kr, and Xe–Xe systems are calculated for several internuclear distances, solving exactly the Thomas–Fermi–Dirac equation for the diatomic systems. Comparisons are made to results from other density f...

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Published in:The Journal of chemical physics 1977-01, Vol.66 (10), p.4551-4556
Main Authors: Yonei, K., Goodisman, J.
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Language:English
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description The energy components and the Thomas–Fermi–Dirac interatomic interaction potentials of the Ar–Ar, Kr–Kr, and Xe–Xe systems are calculated for several internuclear distances, solving exactly the Thomas–Fermi–Dirac equation for the diatomic systems. Comparisons are made to results from other density functional approaches. The dependence of the energy components on the nuclear charge is discussed, and it is suggested that (EαTFD −EαTF)/EαTF, the relative deviation of a TFD energy component from that calculated from the Thomas–Fermi density, is proportional to Z−2/3. A possible analytic form of the interatomic potential is proposed.
doi_str_mv 10.1063/1.433710
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title Thomas–Fermi–Dirac interaction potentials for rare gas systems
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