Relativistic distorted-wave collision strengths for transitions in the 67 Li-like, F-like and Na-like ions with

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• 作者：Christopher J. Fontes ; ^{cjf@lanl.gov" class="auth_mail" title="E-mail the corresponding author} ; Hong Lin Zhang
• 关键词：Electron-impact excitation collision strengths ; Relativistic distorted-wave theory ; Lithium-like ; fluorine-like ; and sodium-like ions ; Improved top-up method
• 刊名：Atomic Data and Nuclear Data Tables
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：113
• 期：Complete
• 页码：293-315
• 全文大小：509 K

文摘

Relativistic distorted-wave collision strengths have been calculated for all possible Δn=0$\Delta n=0$ transitions, where n$n$ denotes the valence shell of the ground level, in the 67 Li-like, F-like and Na-like ions with Z$Z$ in the range be8b5" title="Click to view the MathML source">26≤Z≤92$26\le Z\le 92$. This choice produces 3 transitions with n=2$n=2$ in the Li-like and F-like ions, and 10 transitions with e9bbba8e1aaa" title="Click to view the MathML source">n=3$n=3$ in the Na-like ions. For the Li-like and F-like ions, the calculations were made for the six final, or scattered, electron energies E^′=0.008,0.04,0.10,0.21,0.41$E^{\prime }=0.008,0.04,0.10,0.21,0.41$, and 0.75, where E^′$E^{\prime }$ is in units of 99" class="mathmlsrc">99.gif&_user=111111111&_pii=S0092640X16300080&_rdoc=1&_issn=0092640X&md5=18d06792edf3e44950ded7dd4b338b56">99.gif"> Ry with be57334e77c9f9054b5f8826ccda56">$Z_{\mathrm{eff}}=Z-1.66$ for Li-like ions and $Z_{\mathrm{eff}}=Z-6.667$ for F-like ions. For the Na-like ions, the calculations were made for the six final electron energies 88d8988ca94964704dfcda0" title="Click to view the MathML source">E^′=0.0025,0.015,0.04,0.10,0.21$E^{\prime }=0.0025,0.015,0.04,0.10,0.21$, and 0.40, with $Z_{\mathrm{eff}}=Z-8.34$. In the present calculations, an improved “top-up” method, which employs relativistic plane waves, was used to obtain the high partial-wave contribution for each transition, in contrast to the partial-relativistic Coulomb–Bethe approximation used in previous works by Zhang, Sampson and Fontes [H.L. Zhang, D.H. Sampson, C.J. Fontes, At. Data Nucl. Data Tables 44 (1990) 31; H.L. Zhang, D.H. Sampson, C.J. Fontes, At. Data Nucl. Data Tables 48 (1991) 25; D.H. Sampson, H.L. Zhang, C.J. Fontes, At. Data Nucl. Data Tables 44 (1990) 209]. In those previous works, collision strengths were also provided for Li-, F- and Na-like ions, but for a more comprehensive set of transitions. The collision strengths covered in the present work should be more accurate than the corresponding data given in those previous works and are presented here to replace those earlier results.