Ion-excited XUV radiation from solid targets

A survey of spectra excited by 3 to 4.5 MeV noble gas ions striking solid targets was made in the range from less than 50 eV to 1.5 keV (8 to 250 A) using a grazing-incidence spectrograph. K hypersatellite energies were obtained for the elements Be through Ne, and are compared with other hypersatellite data. Correct identifications of hypersatellite transitions are facilitated by use of both empirical data for nearby elements and Hartree-Fock SCF calculations. Failure of the Slater exchange approximation in SCF computations of hypersatellite energy shifts is demonstrated for both non-relativistic and relativistic methods. No evidence for cooperative K x-ray emission was found for the elements measured. (author)