Spectrum of Sn5+ in the Region 500–1300 Å

Abstract

Abstract:The spectrum of tin, excited in a vacuum spark, was recorded in the region 500-1131 Å on a 6.65-m normal incidence spectrograph. The transitions between 4d 8 5s, 4d 8 6s, 4d 8 5p and 4d 8 5d excited configurations in Sn VI were studied. More than 500 lines of the 4d 8 5p-4d 8 5d and 4d 8 5p-4d 8 6s were identified with the aid of the Cowan code calculations. 67 energy levels (out of 70 possible levels of the 4d 8 5d configuration) and all but two 4d 8 6s levels were found. The wavelength of the 4d 8 5s-4d 8 5p transitions in the region 839-1131 Å were re-measured and supplemented by Sn VI lines in the region 1131-1300 Å measured previously by Srivastava et al. (1977) for optimisation of the energy level values. The SnVI line list in the region 500-1300 Å contains now 741 lines with calculated transition probabilities.