Monte Carlo Calculations of Secondary Electron Emission

Monte Carlo calculations of secondary electron (SE) generation have been performed using a hybrid model of the exponential decay law and cascade multiplication process. The contributions of both valence and core electron excitations, and the production of secondaries by the volume plasmon decay, have been included. The calculation has been extended to include SE\u27s with energies up to half the incident beam energy. The SE yield δSE1 component due to excitation by primary electrons, the SE yield δSE2 due to excitation by backscattered electrons, and the β coefficient are estimated using this model. Calculated SE yields, energy distributions, and β coefficients are in good agreement with the experimental data . The influence of elastic and inelastic scattering for angular distribution of the SE\u27s is discussed

Monte Carlo Calculations of Secondary Electron Emission

Monte Carlo calculations of slow secondary electron (SE) generation have been performed. Construction of a model for SE production involves three distinct steps, determining the trajectory of the incident electron, computing the rate of secondary electron generation along the trajectory of both primary and backscattered electrons, and finally calculating the secondary electron emission by using a hybrid model of the exponential decay law and cascade process. The incident electron trajectory is computed using a plural scattering Monte Carlo model. For secondary electron generation our models take into account all possible creation processes of SE resulting from the interaction of primary and backscattered electrons with free as well as bound (core) electrons and from the volume plasmon decay. Calculated SE yields, energy distributions, angular and depth distributions for Au, Ag Cu and Al are in good agreement with the experimental data available in the literature

Experimental Measurements of Electron Stopping Power at Low Energies

The electron stopping power has been measured for twelve elements and fifteen compounds, over the energy range from 1 eV to 10 keV, by the analysis of electron energy loss spectra, optical data, and photon mass absorption data. Values of the effective mean ionization potential Jeff and the effective number of participating electrons Neff have also been determined in each case. The results obtained have been compared with other experimental data, with first-principles theoretical calculations, and with a number of proposed analytical models