Abstract
Several papers devoted to the Stark widths of ns-np transitions of the homologous sequence Neii, Arii, Krii and Xeii were published (n=n0+1, where n0 is the principal quantum number of the ground level). From their analysis, a general trend for this sequence is established in function of two relevant atomic parameters for the description of Stark line widths: the atomic number, Z and the upper level ionization potential. The experiments of Vitel et al. shows that, due to a dense plasma effect, a nonlinear dependence between the Stark parameters and the electron density exists: w∝Nγe. From the general trend, the value γ=5/6 is established.
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