Cross sections for electron trapping by condensed SF6 and C6H6 under the influence of different polarizable environments

If Benzene molecules adsorbed onto or embedded within rare gas solid films are bombarded with low-energy electrons below 2 eV, charge localization is detected. The maximal cross section for electron trapping by Benzene adsorbed in submonolayers on a Kr film has a value of 8.1 x 10(-19) cm(2) in contrast to the isolated molecule where the anion is unstable. On a more polarizable Xe film the cross section maximum is enhanced by a factor of four. Electron attachment to submonolayer SF, adsorbed on a Kr film yields a cross section of 2.8 X 10(-15) cm(2), which is about one order of magnitude lower than the gas-phase value. On a Xe film this value is enhanced by a factor of 1.6 relative to the Kr substrate. The lower cross SF6- yield in the condensed phase is attributed to a lower capture cross section. (Int J Mass Spectrom 205 (2001) 299-307) (C) 2001 Elsevier Science B.V.