Auger-Mediated Sticking of Positrons to Surfaces: Evidence for a Single-Step Transition from a Scattering State to a Surface Image Potential Bound State

作者：Mukherjee S^*; Nadesalingam M P; Guagliardo P; Sergeant A D; Barbiellini B; Williams J F; Fazleev N G; Weiss A H

来源：Physical Review Letters, 2010, 104(24): 247403.

DOI：10.1103/PhysRevLett.104.247403

We present the observation of an efficient mechanism for positron sticking to surfaces termed here Auger-mediated 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.

• 出版日期2010-6-16
• 单位东北大学