Abstract
Fifty-four fine-structure energy levels of Fe X belonging to the configurations 3s23p5, 3s3p6, 3s23p43d, and 3s3p53d are calculated using extensive configuration-interaction (CI) wave functions, with relativistic effects incorporated through the Breit-Pauli Hamiltonian. The crucial correlation effects arising from the two-electron excitation configurations 3s23p33d2 and 3s3p43d2 are included in the CI expansion. Oscillator strengths and radiative rates are presented for the 460 allowed and intercombination transitions among the 54 levels. The lifetime for the 3s3p6 2S1/2 level is also calculated and compared with available results.
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