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<p><strong>Formulae for secondary electron yield and the ratio of the average number of secondary electrons generated by a single backscattered electron to that generated by a single primary electron</strong></p>

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Title Statement <p><strong>Formulae for secondary electron yield and the ratio of the average number of secondary electrons generated by a single backscattered electron to that generated by a single primary electron</strong></p>
 
Added Entry - Uncontrolled Name Xie, Ai-Gen ; School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology
 
Uncontrolled Index Term Secondary electron yield; Emission angle distribution; Backscattered electron; Incident angle
 
Summary, etc. <strong>On the basis of the characteristic of secondary electron emission, the number of secondary electrons (<em>δ</em><sub>PEθ</sub>) released per primary electron entering metals in the incident energy (<em>W</em><sub>p0</sub>) range 10-102 keV and the incident angle (<em>θ</em>) range 0-89° was deduced. In addition, the number of secondary electrons released per primary electron entering metals at <em>θ=</em>0 (<em>δ</em><sub>PE0</sub>) was obtained. Based on the deduced <em>δ</em><sub>PEθ</sub>, the characteristic of the emission angle distribution of the backscattered electrons and the definition of <em>β</em><sub>θ</sub>, the relationships among <em>β</em><sub>θ</sub>, cos<em>θ </em>and the parameter <em>x</em> were given, where <em>β</em><sub>θ</sub> is the ratio of the average number of secondary electrons generated by a single backscattered electron to that generated by a single primary electron entering the emitter at <em>θ</em>. Considering the relationship between <em>δ</em><sub>PEθ</sub> and <em>δ</em><sub>PE0</sub> and the relationship between the secondary electron yields at <em>W</em><sub>p0</sub>=10-102 keV and <em>θ=</em>0-89°<em> </em>(<em>δ</em><sub>θ</sub>) and the secondary electron yields at <em>θ=</em>0(<em>δ</em><sub>0</sub>), a universal formula for expressing <em>δ</em><sub>θ<em> </em></sub>through <em>δ</em><sub>0</sub>, the backscattered coefficient at <em>θ</em> (<em>η</em><sub>θ</sub>), the backscattered coefficient at <em>θ=</em>0(<em>η</em><sub>0</sub>), cos<em>θ </em>and the parameter <em>x </em>were deduced. Further, the parameters <em>x</em> related to beryllium, uranium, aluminium and copper were computed with the deduced formula and experimental results; then, the formulae for expressing <em>δ</em><sub>θ</sub> from the four metals through <em>δ</em><sub>0</sub>, <em>η</em><sub>θ</sub>, <em>η</em><sub>0</sub><em> </em>and cos<em>θ</em> were obtained; and the relationships between <em>β</em><sub>θ</sub> of the four metals and cos<em>θ</em> were found. The <em>δ</em><sub>θ </sub>calculated with the formulae and the yields measured experimentally were compared. Finally, it is concluded that the formulae for <em>δ</em><sub>θ</sub> and <em>β</em><sub>θ</sub> from the four metals at <em>W</em><sub>p0</sub>=10-102 keV and <em>θ=</em>0-89° have been established, respectively.</strong>
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2015-05-11 13:07:43
 
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http://op.niscair.res.in/index.php/IJPAP/article/view/1984
 
Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 53, ##issue.no## 5 (2015): Indian Journal of Pure & Applied Physics
 
Language Note en
 
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