Effect of Opacity on Neon-like Argon, and Krypton Line Intensity Ratios in Static, and Cylindrically Imploding High-Density Plasmas

Abstract

In connection with X-ray lasers, theoretical line intensity ratios of neon (Ne)-like argon (ArIX) and krypton (KrXXVII) ions in high energy density plasmas have been investigated considering 27 levels of the 2s22p6, 2s22p53s, 2s22p53p, and 2s22p53d configurations. It was found that some line intensity ratios are sensitive to the electron density, the electron temperature, and also opacity in the interest regime of ArIX and KrXXVII X-ray lasers. Our attention is devoted to studying the opacity effects of the important radiative transitions for the lasing condition, namely; those of the 3d 1P1–2p61S0, 3d 3D1–2p61S0, 3d 3P1–2p61S0, 3s 3P1–2p61S0, and 3s 1P1–2p61S0 transitions on the line intensity ratios in both static and cylindrically imploding plasmas under the Sobolev approximation that includes the effect of the large velocity gradient.