The Iron Project and the RMAX Project: Collisional and Radiative Atomic Processes in Fe-Peak Elements and Astrophysics Applications

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New results on radiative and collisional processes will be presented from the Iron Project on the iron-peak elements, and from the Rmax Project relevant to X-ray plasmas. They are obtained from large scale ab initio calculations in the close coupling approximation using the relativistic Breit-Pauli R-matrix method, and the configuration interaction atomic structure code SUPERSTRUCTURE. Results will include: (I) Radiative decay rates for Fe IV for a large number of allowed and forbidden transitions - electric dipole and intercombination (E1), electric quadrupole (E2), electric octupole (E3), and magnetic dipole (M1) - showing varying degrees of agreement with previous calculations; nonetheless, comparing better with measured values; (II) photoionization and recombination cross sections and rate coefficients of Fe XVII from a calculations using a 60-level wavefunction expansion; (III) Photoionization cross sections for Fe II including fine structure, (IV) astrophysical modeling of Fe I/II/III spectra for emission line strengths from active galactic nuclei using large-scale Iron Project data; (V) X-ray diagnostics of Fe XVII lines, with possible solution of longstanding discrepancies between experiments and theory.

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