Open AccessSecondary electron emission from carbon Foils by Ne2+ near Bohr velocity
Author(s) -
Yucheng Yang,
Yongtao Zhao,
Yuyu Wang,
Xing Wang,
Cheng Rui,
Xianming Zhou,
Yongfeng Li,
Shidong Liu,
Yu Lei,
Sun Yuan-Bo,
Lizhong Zeng
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.157901
Subject(s) - recoil , atomic physics , projectile , electron , ion , bohr model , secondary emission , electron multiplier , carbon fibers , atom (system on chip) , physics , materials science , nuclear physics , quantum mechanics , composite number , composite material , computer science , embedded system
We have measured secondary electron emission yields in forward and backward directions from the carbon foils with different thicknesses, which are penetrated by Ne2+ ion of an energy from 2 to 25 keV/u. In the experiment, the contributions of projectile potential energy deposition, electronic energy loss and recoil atom to the forward and backward electron emission yields have been studied systematically by changing the projectile ions energy. Results show that the ions potential energy deposition only have the impact on the backward electron emission yield, while the forward and backward electron emission yields increase approximately linearly with the increase of the electron energy loss at the exit and entrance surfaces of the thin film respectively. When the electron energy loss is low, the impact of recoil atoms on the electron emission cannot be neglected.