Redshift of the isolated atomic emission line in dense plasma

Abstract

We have shown recently that the redshifts of the isolated emission lines of the H-like and He-like ions subject to outside dense plasma environment could be estimated by carefully examining the spatial and temporal criteria of the classical Maxwell-Boltzmann statistics based on the Debye-Hückel (DH) approximation with the nucleus charge Z approximately between 6 and 18. The theoretical results are obtained with the input of the atomic data generated from the detailed non-relativistic and relativistic multi-configuration atomic structure calculations. Qualitatively, starting from the quasi-hydrogenic picture, we are able to show that the redshifts of these emission lines could be expressed in terms of a general expression as a function of an ad hoc parameter, i.e. reduced Debye length and, in turn, linking directly to the ratio between the electron density and the temperature of the dense plasma. Based on our earlier calculation, the results of our estimated redshifts are in good agreement with the most recent experimental measurements.