Abstract

TF emission current densities, total energy distributions and Nottingham inversion temperatures are calculated for three different models of the surface potential barrier. The models studied were: (i) Classical image potential, (ii) Quantum-modified image potential, (iii) Seitz-Van Oostrom modification of the image potential. The modified potential produced the expected lowering of the electron energy distribution and correspondingly reduced emission current densities. The third model potential also produced measurable changes for all quantities calculated. However, neither of the modified potentials yielded agreement with recent experimental values of inversion temperatures. Current work examining sources of this discrepancy are discussed.

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