Transition probabilities for some spectral lines of N III

Astronomy and Astrophysics – Astronomy

Scientific paper

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Atomic Data, Atomic Processes

Scientific paper

Transition probabilities based on sophisticated configuration-interaction wave functions have been obtained for transitions between the 20 lowest lying fine-structure levels of the 2s^22p, 2s2p^2, 2p^3, 2s^23s, 2s^23p and 2s^23d states of N III. The calculations were performed using the CIV 3 code of Hibbert, and small empirical adjustments were introduced to the diagonal Hamiltonian matrix elements in order to achieve accurate energy separations between the levels. The present results are believed to be the most accurate available. Comparison is made with the recent experimental data of Fang et al. for the radiative lifetimes of the 2s2p^2 4P metastable levels, and the discrepancy between theory and experiment is discussed.

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