Ionization of Al recoiled and sputtered from Al(100)

Abstract

The absolute ionization probability of energetic ͑Ͼ500 eV͒ particles recoiled from Al͑100͒ by 2 and 5 keV Xe + bombardment was measured with time-of-flight spectroscopy. These values were then used to calibrate the energy and angular distributions of low-energy ͑10-600 eV͒ sputtered ions collected with an electrostatic analyzer. The independent-particle model of nonadiabatic surface-atom charge exchange, which is typically used to analyze single scattering events, was applied to the ion fractions of the recoiled and sputtered atoms. The model describes all the experimental data from a few eV to the keV range if a different surface electronic temperature is used for recoiling and sputtering. This suggests that the ionization process depends on the instantaneous surface condition at the time of ion emission.

Measuring correlated-electron effects with low energy alkaline earth ion scattering

“…The experiments were carried out in an ultra-high vacuum (UHV) system that was described previously [13]. Polycrystalline for 60 min and heating to 650°C for 5 min to remove embedded Ar.…”

Correlated Electron Effects in Low EnergySr+Ion Scattering

“…The experiments were performed in an ultrahigh vacuum chamber described previously [8]. A polycrystalline Au foil was cleaned in situ by cycles of 0.5-1 keV Ar þ sputtering for 60 min and heating to 650 C for 5 min to remove the embedded Ar.…”

Direct Measurement of Internal Energy of FragmentedC60

“…As a model system, the fragmentation of C 60 has been studied extensively during the past years. Many efforts have been focused on the control of its internal energy prior to the fragmentation by changing the interaction conditions in electron [4,5], photon [6,7], ion, or atom [8][9][10][11] impact experiments. In the most recent single photon absorption experiments, the evaporation of C 2 dimers from multiply charged fullerenes have been studied using monochromatized synchrotron radiation in a large energy range (10 -300 eV) [7,12].…”