Many Body Theory of Charge Transfer in Hyperthermal Atomic Scattering

Abstract

We use the Newns-Anderson Hamiltonian to describe many-body electronic processes that occur when hyperthermal alkali atoms scatter off metallic surfaces. Following Brako and Newns, we expand the electronic many-body wavefunction in the number of particle-hole pairs (we keep terms up to and including a single particle-hole pair). We extend their earlier work by including level crossings, excited neutrals and negative ions. The full set of equations of motion are integrated numerically, without further approximations, to obtain the many-body amplitudes as a function of time. The velocity and work-function dependence of final state quantities such as the distribution of ion charges and excited atomic occupancies are compared with experiment. In particular, experiments that scatter alkali ions off clean Cu(001) surfaces in the energy range 5 to 1600 eV constrain the theory quantitatively. The neutralization probability of Na${}^{+}$ ions shows a minimum at intermediate velocity in agreement with the theory. This behavior contrasts with that of K${}^{+}$, which shows ... (7 figures, not included. Figure requests: [email protected])

43 pages, plain TeX, BUP-JBM-2

Cited by in corpus (10)

• Auger neutralization and ionization processes for charge exchange between slow noble gas atoms and solid surfaces
• Memory Loss and Auger Processes in a Many Body Theory of Charge Transfer
• Room Temperature Kondo effect in atom-surface scattering: dynamical 1/N approach
• Many-body theory of the neutralization of strontium ions on gold surfaces
• Ion-induced secondary electron emission from metal surfaces
• Strong Correlations in Actinide Redox Reactions
• Dynamical 1/N approach to time-dependent currents through quantum dots
• Pseudo-particle approach for charge-transferring molecule-surface collisions
• Mixed-valence correlations in charge-transferring atom-surface collisions
• Energy and Charge Transfer for Na+ Ions Scattered from a Ag(001) Surface