Energy levels and oscillator strengths of excited states in sodium and sodium like ions

The Hartree- Fock (IIF) wave functions of The ,round states IS2 2 S2 2 P6 3s ('S) of members of the sodium isoelectronic sequence (up to Kr XXVI) have been constructed using the Clementi Roetti form of the radial wave functions. The radial wave functions of the excited orbitals of the type ns, rip, rid, nf (n 3 6 for Na 1 and M. 11, and n 3 5 for the other members of the sequence) have been optimized using the C1V3 computer code. The configuration interaction (Cl) wave functions thus obtained have been used in calculatin,' level energies, oscillator strengths and lifetimes of the excited levels of the sodium like ions. Our calculated values agree very well with the values calculated using the Multi configurational Hartree Fock method (MCHF), Non orthogonal Spline Cl method (NOSC1),Multi configurational Dirae Fock method (MCDHF) and compiled data by the National Institute Of Standards and Technology (NIST). Meanwhile some new values for energy levels and oscillator strengths, not reported before, are given in the present work