3 papers
astro-ph.SR2023
R-Matrix calculations for opacities: I. Methodology and computations
A. K. Pradhan, S. N. Nahar, W. Eissner
An extended version of the R-matrix methodology is presented for calculation of radiative parameters for improved plasma opacities. Contrast and comparisons with existing methods p…
astro-ph.SR2023
R-Matrix calculations for opacities: IV. Convergence, completeness, and comparison of relativistic R-matrix and distorted wave calculations for FeXVII and FeXVIII
L. Zhao, S. N. Nahar, W. Eissner +1
To investigate the completeness of coupled channel (CC) Breit-Pauli R-Matrix (BPRM) calculations for opacities, we employ the relativistic distorted wave (RDW) method to complement…
astro-ph.SR2023
R-Matrix calculations for opacities.II. Photoionization and oscillator strengths of iron ions FeXVII, FeXVIII and FeXIX
S. N. Nahar, L. Zhao, W. Eissner +1
Iron is the dominant heavy element that plays an important role in radiation transport in stellar interiors. Owing to its abundance and large number of bound levels and transitions…