Location
Salt Lake Community College
Start Date
5-5-2003 9:10 AM
Description
The angle dependence of emitted electron spectra from a polycrystalline Au surface has been measured at several incident electron beam energies. The range of incident energies (~ 1 00 e V to 2500 e V) extends from below the first crossover energy, through Emax. to above the second crossover energy. The traditional distinction between secondary electrons «50 eV) and backscattered electrons (>50 eV) is found to be inconsistent with our energy- and angle-resolved measurements. We suggest a more "natural" delineation occurs at the local minima of the emission spectra; this feature is studied as a function of incident energy and emission angle. This work is also supported by the NASA Space Environments and Effects Program.
Electron Emission Cross Sections from a Polycrystalline Gold Surface
Salt Lake Community College
The angle dependence of emitted electron spectra from a polycrystalline Au surface has been measured at several incident electron beam energies. The range of incident energies (~ 1 00 e V to 2500 e V) extends from below the first crossover energy, through Emax. to above the second crossover energy. The traditional distinction between secondary electrons «50 eV) and backscattered electrons (>50 eV) is found to be inconsistent with our energy- and angle-resolved measurements. We suggest a more "natural" delineation occurs at the local minima of the emission spectra; this feature is studied as a function of incident energy and emission angle. This work is also supported by the NASA Space Environments and Effects Program.