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Signature of metastable electrons in highly charged ion-surface interactions
1998
Physical Review A. Atomic, Molecular, and Optical Physics
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We present autoionization spectra of metastable Ar(8+) and C(4+), N(5+), O(6+) and Ne(8+) scattering off an Al(111) surface with incident energies down to 5 eV. The unprecedented quality of the experimental data permits the observation of a unique, yet undiscovered peak in the structures originating from the metastable projectiles compared to corresponding ground state configurations. Analyzing the peak positions for different projectile species and velocities we demonstrate that the peak must
doi:10.1103/physreva.58.r1649
fatcat:ymqmn265gna6tbucoazaxdcxui