Relative excitation functions for low-lying and core-excited levels of S IV-S XI populated by the beam-foil interaction

We have investigated the relative-excited and core-excited levels of various charge states of Sulphur. The Pelletron tandem acceleraton in Lund has been used to provide beams of Sulphur ions between 2 and 10 MeV. After the beam-foil interaction, photons from the de-exciting levels were analyzed with a 1 meter normal incidence spectrometer in the wavelength range 550--790 A. This region contains many lines from both singly and core-excited levels. The spectral intensities have been corrected for the average charge state distributions after the foil. Some emphasis will be place on the relative population of singly and core-excited levels within a given charge state