<論文>陽電子・電子入射による固体表面からの2次電子放出

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Secondary electron emission from gold caused by the impacts of positrons and electrons at keV or less energy is investigated by means of a Monte Carlo simulation of elastic and inelastic collision processes of the projectiles and cascade electrons inside the solid. The cross-section for the elastic collision of each particle with the solid atom is calculated using the partial wave expansion technique, whereas the cross-section for the inelastic collision or for the electron excitation is calculated from the Ashley's optical-data model. At low impact energies (<600 eV) the calculated secondary electron yield for the positron is larger than that for the electron, due to the larger inelastic energy loss of the positron and the larger number of excited electrons. The difference between the distributions for the positron and the electron calculated at such low impact energy is due to increasing emission of high-energy electrons excited by the projectile particle without the cascade process; which is more enhanced for the electrons than the positrons.
沼津工業高等専門学校の論文
2000-01-31