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单词 Secondary electron
释义

Secondary electron

英语例句库

In this paper the sample preparation techniques of radiolarite were discussed in order to get high quality secondary electron images in SEM.

讨论了为获得放射虫化石的高质量的二次电子图像所采用的试样制备方法。

英语百科

Secondary electrons

Visualisation of a Townsend avalanche, which is sustained by the generation of secondary electrons in an electric field
Mean free path of low-energy electrons. Secondary electrons are generally considered to have energies below 50 eV. The rate of energy loss for electron scattering is very low, so most electrons released have energies peaking below 5 eV(Seiler, 1983).

Secondary electrons are electrons generated as ionization products. They are called 'secondary' because they are generated by other radiation (the primary radiation). This radiation can be in the form of ions, electrons, or photons with sufficiently high energy, i.e. exceeding the ionization potential. Photoelectrons can be considered an example of secondary electrons where the primary radiation are photons; in some discussions photoelectrons with higher energy (>50 eV) are still considered "primary" while the electrons freed by the photoelectrons are "secondary".

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更新时间:2025/6/22 23:10:21