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Term energies of doubly excited states in argon and argon ions have been determined using single‐configuration Hartree‐Fock calculation. The energies calculated for KL3s3p6nl and KL3s63p4nln1 states of Ar show a fairly good agreement with the experimental results obtained by various techniques. However, for Ar+, Ar2+, Ar2+ and Ar3+ states there are no experimental data available in the literature for comparison.
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El-Sherbini et al. (1982) studied this question.
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