Abstract
The atomic properties have been studied for He-like ions (He atom, Li+, Be2+ and B3+ions). These properties included, the atomic form factor f(S), electron density at the nucleus , nuclear magnetic shielding constant and diamagnetic susceptibility ,which are very important in the study of physical properties of the atoms and ions. For these purpose two types of the wave functions applied are used, the Hartree-Fock (HF) waves function (uncorrelated) and the Configuration interaction (CI) wave function (correlated). All the results and the behaviors obtained in this work have been discussed, interpreted and compared with those previously obtained.
Highlights
The atomic properties have been studied for He-like ions (He atom, Li+, Be2+ and B3+ions)
It is clear from the results that the effect of the atomic number upon the electron density, where the density increases by increasing the atomic number Z, this is due to the effect of the Coulomb attraction forces
The atomic form factor f(S): It is clear from Table (2) and Fig (2) show that the results of the behavior of atomic form factor starts from the maximum value, equal to the atomic number that characterized each element or equal to the number of electrons for each shell, and gradually decline with increasing the scattering angle until reach to the minimum value
Summary
The atomic properties have been studied for He-like ions (He atom, Li+, Be2+ and B3+ions). The relation of X-ray form factor f ( S ) to the electron distribution function D( r )in the atom is expressed by the formula [3,4]. The electron density at the nucleus (0) : Table (1) and Fig (1) show the results of the electron density at the nucleus (0) obtained by Hartree Fock and correlated wave functions for He - like ions.
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