Beam-Foil Studies of Multiply Ionized Oxygen

Beam-foil spectra of oxygen have been recorded in the region 2000-4500 A with emphasis on good spectral resolution. Wavelengths for many hydrogenic transitions in O VI-O VII have been determined with ± 0.1-0.5 A uncertainties. The data are compared with predictions using polarization formulae. A few lifetimes are also reported.