Upper and lower bounds to van der Waals
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R.T Pack
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Article
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1972
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Elsevier Science
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English
β 404 KB
Simple formuhs involving oscillator strength sums S(k), with half-integer k, are shown to giye an asymptotic series. of upper and lower bounds to van der Waals coeffkients. Estimates of the bounds are calculated for several pairs of atoms.