Relativistic distorted-wave col
lision strengths have been calculated for all possible
lick to view the MathML source">Δn=0 transitions, where
lick to view the MathML source">n denotes the valence shell of the ground level, in the 67 Li-
like, F-
like and
Na-
like ions with
lick to view the MathML source">Z in the range
lick to view the MathML source">26≤Z≤92. This choice produces 3 transitions with
lick to view the MathML source">n=2 in the Li-
like and F-
like ions, and 10 transitions with
lick to view the MathML source">n=3 in the Na-
like ions. For the Li-
like and F-
like ions, the calculations were made for the six fi
nal, or scattered, electron energies
lick to view the MathML source">E′=0.008,0.04,0.10,0.21,0.41, and 0.75, where
lick to view the MathML source">E′ is in units of
lineImage" height="19" width="24" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0092640X16300080-si199.gif"> Ry with
lineImage" height="14" width="104" alt="View the MathML source" style="margin-top: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0092640X16300080-si200.gif"> for Li-
like ions and
lineImage" height="14" width="112" alt="View the MathML source" style="margin-top: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0092640X16300080-si201.gif"> for F-
like ions. For the Na-
like ions, the calculations were made for the six fi
nal electron energies
lick to view the MathML source">E′=0.0025,0.015,0.04,0.10,0.21, and 0.40, with
lineImage" height="14" width="104" alt="View the MathML source" style="margin-top: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0092640X16300080-si203.gif">. 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, col
lision strengths were also provided for Li-, F- and Na-
like ions, but for a more comprehensive set of transitions. The col
lision 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 ear
lier results.