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The aim of this work is to evaluate the onc-electron expectation values < r > from the radial electronic density funetion D(r) for different wave ?'unctions for the 2s state of Li atom. The wave functions used were published in 1963,174? and 1993 , respectavily. Using " " ' wave function as a Slater determinant has used the positioning technique for the analysis open shell system of Li (Is2 2s) State.
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Journal BS. Evaluation of the one electron expeetation values for different wave functions. BSJ [Internet]. 6Jun.2004 [cited 19Sep.2020];1(2):336-9. Available from: http://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/570