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Paper: Converged R-Matrix Calculations of the Photoionization of Fe xvii in Astrophysical Plasmas: from Convergence to Completeness
Volume: 515, Workshop on Astrophysical Opacities
Page: 89
Authors: Zhao, L.; Eissner, W.; Nahar, S. N.; Pradhan, A. K.
Abstract: We use the relativistic distorted wave (RDW) method to complement (“top-up”) the photoionization cross sections of Fe xvii obtained with the close-coupling Breit-Pauli R-Matrix (CC-BPRM) method. There is good agreement between RDW and BPRM for the background cross sections where resonances are not present, and the individual fine-structure levels can be correctly matched spectroscopically. To ensure completeness, we consider a high-energy tail up to 500 Ry above the ionization threshold for each level. The top-up contribution results in a ~20% increment in addition to the 35% enhancement found in BPRM calculations relative to the Opacity Project value for the Rosseland mean opacity at the Z-temperature of 2.11×106 K.
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