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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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