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Parameters of the secondary electron yield from metal

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Abstract

Based on a simple classical model that primary electrons interact with the electron of a lattice via a Coulomb force, the condition that the lattice scattering can be ignored and the energy band of metal, we deduced the formula for the average energy required to produce a secondary electron in metal (ɛ m ) as a function of the work function. Based on the physical characteristics of migration and escape of a secondary electron and the definition of the probability (B m ) of secondary electrons passing over the surface barrier of metal into vacuum, we deduced the formula for B m . In addition, the formula for the ratio of B m to ɛ m (\(\beta _{B_\varepsilon } \)) was obtained. According to the physical characteristic of secondary electron emission and some relationship between the parameters of secondary electron yield (δ), the formula for the mean escape depth from metal (1/α) was successfully deduced. The 1/α calculated from this formula and the values measured experimentally from some metals were compared. Finally, we conclude that the formula for 1/α presented in this paper is universal for the estimating 1/α at any energy and that the formula for \(\beta _{B_\varepsilon } \) is correct and is important for estimating δ.

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Authors and Affiliations

  1. School of Physics and Optoelectronic Engineering, Nan**g University of Information Science and Technology, Nan**g, 210044, China

    Ai-Gen **e, Hong-Yan Wu & Jia Xu

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  1. Ai-Gen **e
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  2. Hong-Yan Wu
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  3. Jia Xu
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Correspondence to Ai-Gen **e.

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**e, AG., Wu, HY. & Xu, J. Parameters of the secondary electron yield from metal. Journal of the Korean Physical Society 62, 725–730 (2013). https://doi.org/10.3938/jkps.62.725

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