6 papers · 1 filter
Excitation and ionization by electron impact in transition and super-transition arrays
Djamel Benredjem, Jean-Christophe Pain
This study investigates the ionization and excitation processes induced by electron impact between two configurations or superconfigurations. Rate coefficients are calculated for t…
Corrections to radiative rates between atomic configurations
Jean-Christophe Pain, Djamel Benredjem
The computation of radiative opacity or emissivity of hot dense matter is a challenging task. It requires accounting for an immense number of energy levels and lines across various…
A new approach to include electron interaction effects in super transition array opacity theory
Daniel Aberg, Brian G. Wilson, Jean-Christophe Pain
A method is presented for the improved calculation of super-shell partition functions which include the repulsive electron-electron interaction energy terms in the Boltzmann factor…
Electron-impact ionization of Si IV-VIII relevant for inertial confinement fusion
Jean-Christophe Pain, Djamel Benredjem
In this work, we investigate the ionization of silicon by electron impacts in hot plasmas. Our calculations of the cross sections and rates rely on the Coulomb-Born-Exchange, Binar…
Benford's law in atomic spectra and opacity databases
Jean-Christophe Pain, Yuri Ralchenko
The intriguing law of anomalous numbers, also named Benford's law, states that the significant digits of data follow a logarithmic distribution favoring the smallest values. In thi…
Semi-empirical cross-section formulas for electron-impact ionization and rate coefficient calculations
Djamel Benredjem, Jean-Christophe Pain
We propose a semi-empirical formula for the cross section of ionization by electron impact. The formula involves adjustable parameters which are determined by comparison with measu…