Importance of optical oscillator strengths (OOS) in atomic and molecular physics with special references to P V, S VI, CI VII, Ar VIII AN D K IX

We have reported the importance of the Optical Oscillator strengths with special reference to the inner-Shell excitation (ls² 2S² 2p⁶ 3s ²s^e → 1s² 2S² 2p⁵ 3s²²p⁰). Transition in P V, S VI, CI VII, Ar VIII and K IX [1] ions of the Sodium isoelectronic sequence and discussed the discrepancies in both the forms of Optical Oscillator strength. The results have been compared from At. Data tables of E.Clementi and C.Roetti [2]. CI method was extensively used by Tiwary and co-workers [1,3] and also independently by Tiwary [4,5,6]. Hibbert, Kingston and Tiwary [7] calculated the transition probabilities for many atoms which became a milestone for further research. Idea of using HartreeFock method to calculate oscillator strength was extensively used by Burke, Tiwary and Kingston [8].