ELECTRON IMPACT EXCITATION OF THE  4s-4p  TRANSITION  IN  Zn II

O.I. Zatsarinny  and  L.A. Bandurina

Institute of Electron Physics, Uzhgorod 294016, Ukraine (zoi@iep.uzhgorod.ua)

The electron-impact excitation cross sections for Zn II have been calculated with R-matrix
method in a 15-state close-coupling approximation. The emphasis has been made for accurate
representation of core-valence correlation in target by using the extensive many-configurational
wave functions. Comparison with available experimental and theoretical data as well as detailed
analysis of near-threshold resonance structure are presented.