11:15 AM–2:15 PM, Monday, March 10, 2008
Morial Convention Center - 211
Sponsoring Unit:
DCMP
Chair: John Wendelken, Oak Ridge National Laboratory
Abstract ID: BAPS.2008.MAR.B19.11
1:15 PM–1:27 PM
R.E. Lake
(Clemson University)
M.P. Ray
(Clemson University)
C.E. Sosolik
(Clemson University)
Trajectories of hyperthermal energy alkali ions scattered from single crystal metal surfaces are well described by binary classical collisions with a strong dependence on the atom-surface mass ratio. Such simple events allow hyperthermal ion scattering to be used as a time resolved probe for studying novel surface effects such as femtosecond scale electron transport and ballistic electron excitations. In this talk, three ion scattering cases from the 1-1000 eV energy regime are discussed. K$^{+}$ scattered from Ag(100) is compared to Na$^{+}$ scattered from Cu(100) in terms of interaction potential, image charge effects and neutralization probability. Secondly the heavy atom Cs$^{+}$-Ag(100) system will be presented including a discussion of an anomalous high energy peak possibly attributable to a collective surface response. Finally a method for probing hot electron excitation by an alkali beam scattered from a biased atomically ordered ultrathin film device will be discussed including charge transfer predictions based on rate equations and quantum mechanical 1/N and dynamic matrix renormalization group codes.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.MAR.B19.11