Abstract
Accurate transition probabilities are being calculated using atomic collision theory methods developed under the Iron Project. Relativistic fine structure is treated using the Breit-Pauli R-matrix method. The theory, methods, and the results are described briefly. The computational methods are efficient and enable large-scale calculations with up to the order of 106 transitions in complex ions of the Iron group elements. The first such results are reported for Fe XXV, Fe XXIV, and Fe V. Comparison of oscillator strengths for He-like and Li-like iron with previous calculations including relativistic and quantum electrodynamics effects show agreement at the level of a few percent, but the results for Fe V are expected to be more uncertain. Differences with non-relativistic calculations under the Opacity Project are discussed. The new data are being incorporated into an electronically available Opacity Project/Iron Project database called TOPbase/TIPbase.
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