Debye Plasma Hydrogen Atomic Emission, Absorption Spectrum Of Theoretical Studies

This work investigates the screening effects on the emission and absorption spectra of hydrogen under the local thermodynamic equilibrium (LTE) model in the Debye plasmas. The needed atomic energy levels, the radiative transition probabilities, the radiative and the photoionization cross sections are calculated by solving the Schrodinger equation numerically incorporating the Debye-Huckel model in plasmas. To our knowledge, the emission and absorption spectra are obtained for the first time by using the screening atomic parameters.With total hydrogen atom densities of 1.7×1019cm-3,1.7×1020cm-3 and 1.7×1021cm-3 and plasma temperatures of 1-15eV, the H emission spectrum from the highly excited and continuum states to 1s,2s and 2p states and the absorption spectrum from 1s,2s and 2p states to the highly excited and continuum states are simulated by using both the screened and unscreened atomic parameters. The red-shift and the cutoff of Rydberg spectral lines, produced by the reduction of energy intervals between bound states and the bound states merging into the continuum states, respectively, in the screened Coulomb potential, have been found in the Debye plasmas. it is also found that the spectral intensities decrease with the increasing of the plasma screening interactions. The positions and strengths of continuum spectra show a similar behavior to the resonance lines.Accordingly, the plasma screening interactions also alter the peak positions and heights of absorption spectra in the Debye plasmas.Our works demonstrates that the plasma screening interactions influence the plasma emission and absorption spectra, and this effect should be considered in the simulation of photo spectrum and radiation transport in some specified plasma conditions in the fields of ICF and astrophysics.