Stark broadening of hydrogenic heavy ions in dense inertial-confinement fusion plasmas

The low-frequency microfield distributions obtained for dense ionic mixtures are used to compute the complete combined Stark and Doppler profiles of Lyman $\alpha$ and $\beta$ lines emitted by Ne X and Ar XVIII immersed in dense proton plasmas of interest for inertial-confinement fusion (ICF). Electron broadening is treated within the impact approximation. A certain emphasis is paid to the ion proportion effect, conveniently analyzed through $p=\frac{C_b}{(C_b+C_a)}$. A novel feature of the present calculation is afforded by the wings' behavior that is fully investigated analytically. For $\left|\Delta \nu \right|\ge 2$ Ry, the asymptotic profiles fall within 1% of the completely numerical ones (Doppler excluded). Excellent agreement with previous Tighe-Hooper calculations is achieved. Extensive numerical results are given for $V$ up to 0.8 (where the spectroscopy parameter $V$ is $\frac{r_0}{{\lambda }_{D_e}}$, the ratio between the classical radius of the electron and the electron Debye length).