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- W2111767663 abstract "Abstract A new approximation formalism is applied to study the bound states of the Hellmann potential, which represents the superposition of the attractive Coulomb potential − a / r and the Yukawa potential b exp (− δr )/ r of arbitrary strength b and screening parameter δ . Although the analytic expressions for the energy eigenvalues E n ,l yield quite accurate results for a wide range of n , l in the limit of very weak screening, the results become gradually worse as the strength b and the screening coefficient δ increase. This is because that the expansion parameter is not sufficiently small enough to guarantee the convergence of the expansion series for the energy levels." @default.
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- W2111767663 date "2007-05-01" @default.
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- W2111767663 title "A perturbative treatment for the bound states of the Hellmann potential" @default.
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- W2111767663 doi "https://doi.org/10.1016/j.theochem.2007.01.019" @default.
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