Kinetic-energy-assisted He+-ion neutralization at a solid CO2 surface - art. no. 054901

The neutralization of He+ ions at a solid CO2 surface is investigated by an alyzing the energy distribution of electrons ejected from the surface and b y use of spin-labeling techniques, specifically the use of electron-spin-po larized He+ ions coupled with energy-resolved measurements of the ejected-e lectron polarization. The data indicate that ion impact leads to efficient electron ejection through formation of an autoionizing collision complex co mprised of the incident ion and two neighboring CO2 molecules in which a si gnificant portion of the initial kinetic energy of the ion is converted to potential energy.