81 citations · 796 across the 47 of their papers we have counts for
47 papers
R-matrix calculations for opacities: V. Temperature-density dependence of photoabsorption cross sections and opacity spectra of oxygen ions O VI and O VII
Divya Chari, Sultana N Nahar, Anil K Pradhan
We present R-matrix photoabsorption cross sections for Li-like oxygen O VI and He-like oxygen O VII and examine how plasma broadening modifies them as a function of temperature and…
Emissivity line ratios for [Mn III] and spectral diagnostics of H II regions
Zher Samak, Sultana N. Nahar, Anil K. Pradhan
We present the first theoretical emission-line study of Mn III as potential determinant of physical conditions and manganese abundance. We compute atomic data for a set of Mn III l…
The Opacity Project: R-Matrix Calculations for Opacities of High-Energy-Density Astrophysical and Laboratory Plasmas
Anil K. Pradhan, Sultana N. Nahar
Accurate determination of opacity is critical for understanding radiation transport in both astrophysical and laboratory plasmas. We employ atomic data from R-Matrix calculations t…
Spectra of phosphorus ions for astrophysical modeling: P I - P XV
Sultana N. Nahar, Bilal Shafique
Phosphorus (P), a basic element of life, has been a least studied element due to its poor presence in astrophysical spectra. However, search for the P lines has increased considera…
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…
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…