Fluorescence polarization studies of autoionization in CS2

The polarization of the CS+2(A 2Π→X 2Π) transition was measured following photoionization of CS2 with synchrotron radiation excitation in the range 875 Å<λexc <967 Å. Autoionization features are prominent in the fluorescence polarization spectrum and were investigated in detail. The spectral assignments of the absorption spectrum by Ogawa and Chang [Can. J. Phys. 48, 2455 (1970)] are supported by the current measurements. Although fluorescence excitation and fluorescence polarization profiles normally align precisely, exceptions have been found for many resonances (σu →ndπ, n>3), and comparisons between the line shapes are given for several features.