Formula for average energy required to produce a secondary electron in an insulator

doi:10.1088/1674-1056/22/5/057901

Abstract Based on a simple classical model specifying that the primary electrons interact with the electrons of a lattice through the Coulomb force and a conclusion that the lattice scattering can be ignored, the formula for the average energy required to produce a secondary electron (ε) is obtained. On the basis of the energy band of an insulator and the formula for ε, the formula for the average energy required to produce a secondary electron in an insulator (ε_i) is deduced as a function of the width of the forbidden band (E_g) and electron affinity χ. Experimental values and the ε_i values calculated with the formula are compared, and the results validate the theory that explains the relationships among E_g, χ, and ε_i and suggest that the formula for ε_i is universal on the condition that the primary electrons at any energy hit the insulator.

Keywords: width of forbidden band electron affinity average energy insulator

Received: 23 August 2012
Revised: 22 October 2012
Accepted manuscript online:

PACS:

79.20.Hx

(Electron impact: secondary emission)

Fund: Project supported by the Special Funds of the National Natural Science Foundation of China (Grant No. 51245010) and the Natural Science Foundation of Jiangsu Province, China (Grant No. 10KJB180004).

Corresponding Authors: Xie Ai-Gen
E-mail: xagth@126.com

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Xie Ai-Gen (谢爱根), Zhan Yu (詹煜), Gao Zhi-Yong (高志勇), Wu Hong-Yan (吴红艳) Formula for average energy required to produce a secondary electron in an insulator 2013 Chin. Phys. B 22 057901

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Formula for average energy required to produce a secondary electron in an insulator

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