First-order many-body theory was modified to include correlation effects in the target description and used to calculate differential cross sections, coherence, and correlation parameters for the electron-impact excitation of the 3 'P and 3 'P states of magnesium at incident energies of 20, 30, 40, 50, and 100 eV. The results are analyzed and compared with available theoretical and experimental results.

A capillary discharge tube was used to record the Xe spectrum in the 400-5500 Å region. A set of 243 lines of the Xe vi spectrum was observed, and 146 of them were classified for the first time. For all known lines, we calculated the weighted oscillator strengths (gf) and weighted transition probabilities (gA) using the configuration interaction in a relativistic Hartree-Fock approach. The energy matrix was calculated using energy parameters adjusted to fit the experimental energy levels. Core polarization effects were taken into account in our calculations. Experimental energy values and calculated lifetimes are also presented for a set of 88 levels. From these levels, 32 were classified for the first time and 33 had their values revised. Our analysis of the 5s5p5d and 5s5p6s configurations was extended in order to clarify discrepancies among previous works.

R e v ise d and Exte nd e d A n a ly s is o f Five T im e s Ionized

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