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- W2076613912 abstract "As a consequence of the virial theorem and Hellmann–Feynman relation, the ratio of the kinetic energy to the derivative of the total energy, Λ(λ)≡T(λ)/E′(λ), is stationary and equal to the critical parameter value λc at λ=λc: E(λc)=0↘Λ′(λc)=0 and Λ(λc)=λc. The cubic approximation to the latter equation yields positive roots within 3.02% and 0.33% of the exact λc values for the exponential and exponential-cosine screening functions, respectively. An alternative estimation formula for λc is also presented and shown to give a value within 0.19% of the exact λc value for the exponential screening function." @default.
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- W2076613912 date "1987-04-01" @default.
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- W2076613912 title "Analytical estimation of critical parameter values for bound states of screened Coulomb potentials" @default.
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- W2076613912 doi "https://doi.org/10.1063/1.527589" @default.
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