Theoretical Research On The Energy Structure And Oscillator Strength Of Excited States For Co²⁴⁺ Ion

The theoretical research on the transition energy and oscillator strengths of the whole energy region for lithium-like Co24+ion is mainly discussed in this article.The summarization of the methods of dealing with the lithium-like ions, the principle and the achievement of Full-core plus correlation (FCPC) are narrated in detail. The FCPC method is extended to calculate the ionization potentials, excitation energies and transition energy of 1s2nl (l=d, f; n≤9)states for Co24+ion. In order to obtain the high-precision theoretical results, relativistic and mass-polarization effects on the energies are included as the first-order perturbation; The quantum-electrodynamics contribution and higher-order relativistic contribution are evaluated by using effective nuclear charges; The correction of core, and the higher 1 contributions to the energy are calculated too. The fine structure is calculated by using the spin-orbit and the spin-other-orbit interaction operators. The quantum defects of 1s2nl(l=d, f; n≤9)two Rydberg series for Co24+ion are determined by the single-channel quantum defect theory. The energies of any highly excite states with n>10 also can be reliably predicted by using the quantum defects which are function of energy.The dipole oscillator strengths for the 1s2nd-1s2n'f (3≤n≤9,4≤n'≤9)transitions of Co24+ion are also calculated with FCPC wave functions obtained above. Combining the single channel quantum defect theory with the discrete oscillator strengths, the oscillator strengths for transitions and the oscillator strength densities corresponding to the bound-free transitions from a certain initial state to all final states of the Rydberg series are obtained, and the theoretical research on the property of the whole energy region for Co24+ion dipole transitions is fulfilled too.