Section V. Electron emissionProportionality between the secondary electron yield and the electronic stopping power for proton impact on aluminium
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Cited by (17)
Monte Carlo study of ion-induced backward and forward secondary electron emission from thin Al foil
2008, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and AtomsCitation Excerpt :Like several experiments [5,7,9] on thin metallic and carbon files our simulation also gives larger forward than backward electron yield for high-energy ions, despite the fact that energy of the projectile ion is lower at the exit. It may be due to the reason that the electrons are preferentially excited in forward direction and deposit their energy downstream from their point of creation [9,24]. Fig. 5 shows two-dimensional distributions of the excitation points of the electrons emitted from Al target in backward and forward direction upon impact of 5, 15 and 35 keV Cu+ ions.
Backward and forward electron emission induced by helium projectiles incident on thin carbon foils: Influence of charge changing processes
2007, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and AtomsCitation Excerpt :Recent experimental studies [6–10] have shown variations of these specific yields as a function of the incident ion energy (proton or helium), particularly for the forward specific yield. For protons incident on aluminium or carbon targets, “microscopic” theoretical calculations (see [9–12] for instance) have shown similar variations, i.e. ΛB varies slightly with the incident projectile energy while ΛF is strongly depending on the incident proton energy. This result is explained by electron transport effects and by the anisotropy of the electron source.
Influence of the target thickness on the backward and forward electron emission characteristics induced by protons incident on thin carbon foils
2005, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and AtomsCitation Excerpt :For thin metallic or carbon foils, experiments [5] have shown that Rγ is always larger than one for all projectile and target combinations. This is due to the anisotropy of the “source” of excited electrons inside the material, i.e. to the fact that the electrons are preferentially excited in the forward direction [6,7]. In particular, close collisions lead to high energy electrons excited in the forward direction, that can be called δ-electrons [8].
Saturation effects in highly charged ion interaction with thin carbon foils
2003, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and AtomsCitation Excerpt :In our case, the ratio QP/vP varies from a value of 2 × 10−3 for a proton (weak perturbation) up to a value of 2 for Mo39+ (strong perturbation) at 9.2 MeV/u. We have shown that the CDW-EIS theory can be used to go beyond the linear response theory [4] and that it gives a better description of the variation of the backward yield γB versus QP. A similar trend is observed for the stopping power dependence on QP.
Experimental and theoretical study of the ratio between the electron emission yield and the electronic stopping power for protons incident on thin carbon foils
2002, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and AtomsSimulation of particle-induced electron emission in aluminum and copper
2000, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
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Chercheur qualifié du Ponds National Belge de la Recherche Scientifique.