Effect of strongly coupled plasma on the spectra of hydrogenlike carbon, aluminium and argon

Abstract

Abstract.A detailed study has been performed for estimating the orbital energies, positions and shifts of the Lyman lines of C 5+ , Al 12+ and Ar 17+ under strongly coupled plasma with a view to understand such line positions and shifts obtained in laser produced plasma experiments. The effect of strongly coupled plasma has been treated within the Ion Sphere (IS) model. Both non-relativistic and relativistic methods have been used for estimating the spectral properties. Theoretical estimates with IS model of the plasma are in conformity with the results of laser plasma experiments on these highly stripped ions. The experimental data for the systems have also been compared with the theoretical estimates using Debye screening model of the plasma with spatial confinements which gives additional restrictions to the wave functions at finite boundaries. PACS

Effect of screening by external charges on the atomic orbitals and photoinduced processes within the Hartree-Fock-Slater atom

“…Now we also account for the presence of external ions, using the ion-sphere model [40,47] with constant electron and ion densities. The net charge is assumed to be equal to zero.…”

“…The charge Z i is the effective charge of ions. In contrast to conventional ion-sphere models [40,47], we introduce the ion-ion radial distribution function g ii (r) [56], assuming our system to be isotropic and homogeneous. Further, the assumed quasineutrality of the system implies Z i n i − n e = 0.…”

“…They found a larger deviation from the isolated-atom case than that given by the Stewart-Pyatt shift. Modifications of atomic properties in a plasma environment have been studied with the Debye screening model and the ion-sphere model for one-electron systems [40][41][42] and many-electron systems [43][44][45][46]. Other studies of the lowering of the ionization energy are summarized in Ref.…”

Low Perturbative Observation of Moderately Coupled Plasma Using Probe Laser Induced Fluorescence

“…Debye screening is commonly accepted as a screening mechanism valid in WCP, on the other side, the ion sphere model is used in SCP [2]. Since the screening mechanisms affect many processes in plasma [3][4][5][6][7], it is interesting to clarify how these screening mechanisms change mutually in the intermediate region between SCP and WCP. However, experimental studies of the moderately coupled plasma (MCP) was not performed so much so far, since it is practically difficult to control plasma in the wide range of .…”

Relativistic energy levels for ions in plasma

“…Saha and co-workers have calculated the relativist energy levels of a beryllium-like ion [20,21]. Using the ion sphere model within relativistic theory, Bhattacharyya et al have studied the effect of strongly coupled plasma on the spectra of hydrogen-like ions [22]. Within relativistic Dirac-Fock theory, Jian-Guo et al studied the energy levels and transition rates for like-hydrogen ion in plasma [15], and Saha and Fritzsche [23] studied the Be I isoelectronic sequence.…”