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- W2074535939 abstract "From the form of the exact ground-state wavefunction psi , of a helium-like atom, the dependence on the first power of the interparticle coordinates r1, r2 and r12 is easily obtained. The authors construct a simple model wavefunction phi that (a) agrees with the exact wavefunction to first order in r1, r2 and r12, (b) is finite everywhere, is normalisable and satisfies the derivative cusp conditions as r1, r2 or r12 to 0, and (c) satisfies the virial theorem. If the exact wavefunction psi is written psi = phi chi , then chi satisfies a transformed Schrodinger equation, H' chi =E chi where H' has no poles at the electron-nucleus or electron-electron coalescences. It is shown, by a linear transformation of the interparticle coordinates, that all integrals required for the evaluation of the energy reduce to products of gamma functions." @default.
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- W2074535939 date "1986-06-14" @default.
- W2074535939 modified "2023-09-27" @default.
- W2074535939 title "A model wavefunction including electron correlation for the ground state of the helium isoelectronic sequence" @default.
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- W2074535939 doi "https://doi.org/10.1088/0022-3700/19/11/014" @default.
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