Modeling of continuous absorption of electromagnetic radiation in dense partially ionized plasmas

Abstract

A new modeling way of describing the continuous absorption of electromagnetic (EM) radiation in dense partially ionized hydrogen plasma is tested in this work. It is shown that the obtained results give a possibility of calculating spectral absorption coefficients which characterize the relevant absorption processes in partially ionized hydrogen plasmas with electron densities N e ∼ 10 19 cm −3 and temperatures T ≈ 2 · 10 4 K. A key parameter of the used procedure is determined empirically. The calculation method is applied to wavelength region 300nm < λ < 500nm. The presented results can be of interest for dense laboratory plasmas as well as for partially ionized layers of different stellar atmospheres.

The Application of the Cut-Off Coulomb Model Potential for the Calculation of Bound-Bound State Transitions

“…As an adequate model potential for hydrogen plasma with such density, we choose, as in [3,5], the screening cut-off Coulomb potential, which satisfies above conditions, and can be presented in the form:…”

“…As in [3,5,8], we will take the value U p;c as the zero of energy. After that, the potential Equation (2) is transformed to the form…”

“…The problems of plasma opacity, energy transport and radiative transfer under moderate and strong non-ideality are of interest in theoretical and experimental research [1][2][3][4]. The strong coupling and density effects in plasma radiation were the subject of numerous experimental and theoretical studies in the last decades.…”

“…By now, this approximation has been used in order to describe transport properties of dense plasmas (e.g., [1,5,6]), but it was clear that it could be applied to some absorption processes in non-ideal plasmas too [3,[7][8][9]. This topic itself, and the search for more consistent models of screening and more realistic potentials in plasmas is still continuing and is very real (e.g., [10][11][12][13] and references therein).…”

The Screening Characteristics of the Dense Astrophysical Plasmas: The Three-Component Systems

“…In these papers, the single-and two-component systems are discussed with their properties in the region of higher non-ideality degree. This topic itself, the discussion and the search for more consistent models of screening and more realistic potentials in plasmas are still continuing and are very real (see [4][5][6][7][8][9]). The screening in astroplasma surroundings is a collective effect of many correlated particle interactions.…”