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- W1591777087 abstract "The $1/Z$-expansion for the Coulomb system of infinitely massive center of charge Z and two electrons is discussed. Numerical deficiency in Baker et al, {em Phys. Rev. bf A41}, 1247 (1990) is indicated which continue to raise doubts in correctness of their calculations of the higher order coefficients in $1/Z$-expansion expressed in Refs.[4-5]. It is shown that a minor modification of a few first coefficients found in Ref.[3] allows to calculate the ground state energies at = 1, 2,ldots 10$ (as well as at $Z > 10$) with a portion of 15th decimal digit in comparison with highly accurate calculations by C. Schwartz and by Nakashima-Nakatsuji. Ground state energies of two-electron ions $Z=11 (Na^{9+})$ and $Z=12 (Mg^{10+})$ are found with 14 decimal digits." @default.
- W1591777087 created "2016-06-24" @default.
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- W1591777087 date "2013-09-11" @default.
- W1591777087 modified "2023-10-01" @default.
- W1591777087 title "On 1/Z expansion for two-electron systems" @default.
- W1591777087 hasPublicationYear "2013" @default.
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