EXPERIMENTAL BENCHMARK OF THE RELATIVE EXCITATION CROSS SECTIONS OF THE=
 2p-3d RESONANCE AND INTERCOMBINATION TRANSITIONS IN NEON-LIKE IONS
G. V. Brown, P. Beiersdorfer, D. A. Liedahl, K. J. Reed, S. B. Utter
Lawrence Livermore National Laboratory, Livermore, CA, U.S.A.
We measured the relative electron-impact excitation cross sections for the=
 resonance and intercombination transitions from neon-like ions between=
 Cr$^{14+}$ and Kr$^{26+}$. Systematic discrepancies with distorted-wave=
 calculations are found that indicate the  conundrum facing theory when=
 computing  the excitation cross section of triplet and singlet lines in the=
 cross over region between LS and jj coupling.