ANALYSIS OF THE 4D9-4D8(4F-VI(6P) TRANSITION ARRAY OF SN)

The spectrum of tin was photographed in the 150-250 angstrom region on a 10.7 m spectrograph at the NIST Laboratory in Gaithersburg, USA, an d the 3m spectrograph in Troitsk, Russia, using a triggered spark sour ce. In the 4d9-4d8(4f + 6p) transition array of Sn VI spectrum 85 line s have been classified. Sixty-three levels belonging to the 4d(8)4f an d 4d(8)6p configurations have been established. Parametric least-squar es-fitting calculations including configuration interaction between th e 4d8(5p + 6p + 4f + 5f + 6f) and 4p(5)4d10 configurations were carrie d out to interpret the observed spectrum adequately.