Study of charge-charge coupling effects on dipole emitter relaxation within a classical electron-ion plasma description

Emmanuelle Dufour (1) , Annette Calisti (1) , Bernard Talin (1) , Marco A. Gigosos (2) , Manuel A. Gonzalez (2) , Teresa del Rio Gaztelurrutia (3) , James W. Dufty (4)

1 PIIM - Physique des interactions ioniques et moléculaires
2 Departamento de Optica y Fisica Aplicada
3 Escuela Superior de Ingenieros
4 Department of Physics

Studies of charge-charge (ion-ion, ion-electron, and electron-electron) coupling properties for ion impurities in an electron gas and for a two component plasma are carried out on the basis of a regularized electron-ion potential without short-range Coulomb divergence. This work is motivated in part by questions arising from recent spectroscopic measurements revealing discrepancies with present theoretical descriptions. Many of the current radiative property models for plasmas include only single electron-emitter collisions and neglect some or all charge-charge interactions. A molecular dynamics simulation of dipole relaxation is proposed here to allow proper account of many electron-emitter interactions and all charge-charge couplings. As illustrations, molecular dynamics simulations are reported for the cases of a single ion imbedded in an electron plasma and for a two-component ion-electron plasma. Ion-ion, electron-ion, and electron-electron coupling effects are discussed for hydrogen-like Balmer alpha lines.

Mots clés: Molecular Dynamics simulation; line shapes; charge-charge correlation effects in plasmas

Domaines: Physique des plasmas [physics.plasm-ph]; Physique Atomique [physics.atom-ph]

Emmanuelle Dufour, Annette Calisti, Bernard Talin, Marco A. Gigosos, Manuel A. Gonzalez, et al.. Study of charge-charge coupling effects on dipole emitter relaxation within a classical electron-ion plasma description. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2005, 71, pp.066409. ⟨10.1103/PhysRevE.71.066409⟩. ⟨hal-00136785⟩