Abstract
Accurate spin wave functions of the light atoms from He to N atom are analyzed. The constituents of such wave functions are the use of Slater orbitals and spin eigenfunctions, the construction of symmetry-adapted configurations and the inclusion of the interelectronic coordinates into the wave function. These wave functions have been tested in actual calculations. Some examples of the calculated energies of atomic states of the Be, B, and C atoms are reported here and recent calculations on the $$^{4}S$$ ground state of the N atom are presented. In addition, the main properties of the different types of Hylleraas wave functions are summarized and these are compared. Especially, the Hylleraas–Configuration Interaction wave function is defined in detail.
Published Version
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