Atomic structure and polarization line shift in dense and hot plasmas

A model of a confined atom in a self-consistent field has been developed to describe the high-density effects on atomic bound states in plasmas. Numerical values, asymptotic behaviors, and scaling laws are given for energy levels and spectral line shifts. Concurrently, a suitable quantum-mechanical impact calculation has been performed to obtain linewidths and line shifts. For a typical electron temperature and density of laser plasma, it has been shown that line shifts given by the two approaches are in agreement within 10%.