10 papers
Inferring partial crystalline order in liquids from electrical resistivity
Nadine Wetta, Jean-Christophe Pain
This work investigates how locally persistent crystal-like ordering in liquids influences the Debye-Waller factor. We have developed a theoretical framework based on liquid-phonon…
An analytic derivation of a generating function for -alternating permutations
Jean-Christophe Pain
We study the inversion enumerator of permutations whose descent set is fixed to be the set of multiples of a fixed integer . For each , let denot…
Modular Ackermann maps and hierarchical structures
Jean-Christophe Pain
We introduce and study modular truncations of the Ackermann function, formalized as discrete dynamical trajectories on the set of least non-negative residues. These maps form a hie…
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…
Modeling stopping power of ions in plasmas using parametric potentials
Tanguy Barges Delattre, Sébastien Rassou, Jean-Christophe Pain
We present a study of the ion stopping power due to free and bound electrons in a warm dense plasma. Our main goal is to propose a method of stopping-power calculation expected to…
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…