“…Indeed, all of the major structure observed in the present investigation may be attributed to intervalence transitions. ine phoioabsorpiion cross seciion of SF6 has been siudied from ihreshoid io the soft x-ray region in several previous experiments (Liu eta/ 1951, Nostrand and Duncan 1954, La Villa and Deslattes 1966, Codling 1966, Zimkina and Fomichev 1967, Zimkina and Vinogradov 1971, Vinogradov and Zimkina 1972, La Villa 1972 (1966) and by Hitchcock and Van der Wiel more recently Sze and Brion (1990) have measured relative cross sections in the vicinity of the inner shell F Is, S 2s and S 2p edges and between 6 and 60 eV. Mass spectrometry has been used to measure the relative photoionization yields of parent and daughter ions from threshold to approximately 450 8, (Dibeler and Walker 1966, Sasanuma et a/ 1979, Berkowitz 1979, Creasey et a/ 1991), and ion pair formation has been studied…”