Transmission Probability of Secondary Electrons
across Surface Potential to Vacuum
- Practical Electron Microscopy and Database -
- An Online Book -

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This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.

 

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By approximation, we can use the free-electron model to estimate the motion of electrons interacting with materials. Based on elementary quantum mechanics, the transmission probability of secondary electrons (SEs) across the surface potential barrier from the SEM specimen, T(S/V). can be given by [1],

                         transmission probability of secondary electrons (SEs) across the surface potential barrier ----------------------------- [4569a]

                   and, transmission probability of secondary electrons (SEs) across the surface potential barrier --------------------------------- [4569b]

where Ek is the SE kinetic energy into the vacuum and Es is the corresponding SE kinetic energy in the specimen; α is the SE angle of emission into the vacuum from the specimen.

 

[1] Kuhr, J.C. & Fitting, H.J. (1999) Monte Carlo simulation of electron emission from solids. J. Electr. Spectrosc. Rel. Phen. 105, 257–273.

 

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