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Effect of the Ion Microfield Fluctuations on the Lyman-α Fine-Structure Doublet of Hydrogenic Ions in Dense Plasmas

A computer simulation technique has been used to analyse the effects of ion microfield fluctuations on the Lyman-α fine-structure doublet of hydrogenic ions for the plasma conditions found in inertial confinement fusion (ICF). For a large domain of plasma parameters of interest in ICF our calculations demonstrate that the ion broadening mechanism belongs to a regime which is intermediate between the limiting impact or quasi-static approximations which have been used previously. Our simulation calculations are compared to quasi-static ion profiles in the case of the Ar+17 Lyman-α doublet for several densities and both proton or Ar+17 perturbers.