Abstract
One particle expectation value for 1S2 configuration for Z =2 to 10 are evaluated by using Hartree-Fock-Roothaan (HFR) wavefunction. A linear relation are determined to describe these results, and this relation have tested to check its ability to calculate one particle expectation value for atoms with higher atomic numbers (Z = 2 to 100). Results are in good agreement with calculations given by [S.L. Saito Atomic Data and Nuclear Data Tables95, (2009) ,836-870] for Z<20.
The article was added to IASJ on 2012-12-08
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