Abstract

The spectra of highly ionized xenon were generated in a tokamak plasma and photographed in the region 60–350 Å with a 2.2-m grazing-incidence spectrograph. The 4s²–4s4p transitions of Zn-like xenon (Xe xxv) and all the 4l–4(l + 1) transitions of Cu-like xenon (Xe xxvi) were measured with estimated uncertainties of ±0.005 Å. These measurements have been combined with previous wavelength measurements of Xe xxvi to determine energy levels. A value for the ionization energy of Xe²⁵⁺ of 6 912 400 ± 3000 cm⁻¹ (857.0 ± 0.4 eV) was derived.

© 1988 Optical Society of America

Aluminumlike spectra of copper through molybdenum

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