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- W2238491319 abstract "The influence of various correlation functions, multiplying the monoelectronic space function, is studied and applied to the helium atom and its isoelectronic series. We used Slater-type basis orbitals and the ground and first excited states have been studied, taking into account the virial and cusp conditions. In the ground state, a very good value for the correlation energy is obtained, using a function of the type: 1 - (1/1 + 2$alpha$) e/sup -alphar$sub 12$/. For the excited states, this type of function overestimates the assumed value of the correlation energy. (auth)" @default.
- W2238491319 created "2016-06-24" @default.
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- W2238491319 date "1976-01-01" @default.
- W2238491319 modified "2023-09-23" @default.
- W2238491319 title "Influence of the structure of various functions on the evaluation of the correlation energy" @default.
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