Photoabsorption cross sections and radiative processes of SnCl4 and Sn(CH3)4 in the 6–31 eV region

Photoabsorption and fluorescence cross sections of SnCl4 and Sn(CH3)4 have been measured in the 6–31 eV region by using synchrotron radiation. Bands above 8 eV observed in the photoabsorption and fluorescence excitation spectra of SnCl4 have been assigned as the (np, 4d) ← 1t1, (4s, np, 4d) ← 3t2, np ← 1e and (4s, 4p) ← 2t2 Rydberg transitions where n = 4−6, whereas the bands observed from Sn(CH3)4 were too broad to assign. For SnCl4, strong emissions produced by 10.9 eV radiation have been assigned to the A1B1-X1A1 and 3B1-X1A1 transitions of the SnCl2 radical, while several Sn I lines were observed by 21.5 eV radiation. In the fluorescence excitation spectrum of Sn(CH3)4, a band attributable to Sn I lines was observed in the 18–23 eV region.