Energy levels, lifetimes, oscillator strengths and transition probabilities for the multicharged oxygen like Cl X ion have been calculated with the configuration expansion: 2s22p4, 2p6, 2s22p33p, 2s2p5, 2s22p33s, 2s22p34s, 2s22p33d, 2s22p34d, 2s2p43s and 2s2p44s. We used two methods in the calculations: the Hartree–Fock pseudo-relativistic approach and the Thomas–Fermi–Dirac–Amaldi potential approach using the Cowan and the AUTOSTRUCTURE atomic structure codes respectively. Results have been compared with available experimental data from the National Institute of Standards and Technology Atomic Spectra Database (NIST-ASD) and with results from other available calculations.There is a great lack of atomic structure data of Cl X and obtained new data will be important for physics applications and astrophysical modeling.
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