Auger mediated quantum sticking of positrons to surfaces: Evidence for single step transition from a scattering state to a surface image potential bound state

Abstract

We present the observation of an efficient mechanism for positron sticking to surfaces termed here Auger mediated quantum sticking. In this process the energy associated with the positrons transition from an unbound scattering state to a bound image potential state is coupled to a valence electron which can then have sufficient energy to leave the surface. Compelling evidence for this mechanism is found in a narrow secondary electron peak observed at incident positron kinetic energies well below the electron work function.

arXiv comment4 pages, 4 figures

References in corpus (2)

• The healing mechanism for excited molecules near metallic surfaces
• Spontaneous Magnetization and Electron Momentum Density in 3D Quantum Dots

Cited by in corpus (13)

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• Photoemission spectroscopy using virtual photons emitted by positron sticking: a new probe of the top layer surface electronic structure
• Direct evidence for low-energy electron emission following O LVV Auger transitions at oxide surfaces
• Positron Induced Electron Emission from Graphite
• Monte Carlo analysis of the contributions of long-lived positronium to the spectra of positron-impact-induced secondary electrons measured using an annihilation-gamma-triggered time-of-flight spectrometer
• Identification of Auger mechanisms responsible for low energy electron emission from graphene on copper using Auger-gamma coincidence spectroscopy