中国物理B ›› 2005, Vol. 14 ›› Issue (7): 1465-1470.doi: 10.1088/1009-1963/14/7/035
周筑颖1, 施立群1, 赵国庆1, 卢其亮2
Lu Qi-Liang (卢其亮)ab, Zhou Zhu-Ying (周筑颖)b, Shi Li-Qun (施立群)b, Zhao Guo-Qing (赵国庆)b
摘要: The incident angle dependence of secondary electron emission induced by a swift H$_{2}^{+}$ ion impinging on carbon is studied using the Monte Carlo method combined with the semiempirical theory. The relationships both between the electron emission yield and the project angle and between the statistics and the projectile angle are investigated. The results show that the backward electron emission yield deviates from the inverse cosine law, due to the effect of the valence electrons of H$_{2}^{+}$. The ratio of the forward electron emission yield to the backward electron emission yield at the inclining incidence is different from that at the normal incidence. The statistical distribution of electron emission is independent of the incident angle. The value of $b$, the deviation parameter from the Poisson distribution, increases with projectile energy.
中图分类号: (Electron impact: secondary emission)