Electronic stopping power

Ema data can be quantitated to provide elemental concentrations, but several corrections are necessary to account for matrix effects adequately. One weU-known method for matrix correction is the 2af method (7,31). This approach is based on calculated corrections for major matrix-dependent effects which alter the intensity of x-rays observed at a particular energy after being emitted from the corresponding atoms. The 2af method corrects for differences between elements in electron stopping power and backscattering (the correction), self-absorption of x-rays by the matrix (the a correction), and the excitation of x-rays from one element by x-rays emitted from a different element, or in other words, secondary fluorescence (the f correction). 

The electronic stopping power of the 2 MeV Ne+ ions in the palladium acetate films is much larger than that of 2 MeV He ions. The most obvious difference between the effects of the two ions is in the appearance of the films at the high dose limit. A 0.90 nm thick palladium acetate film exposed to 2 MeV Ne+ ion irradiation until no further spectroscopic changes occur looks black, compared with the metallic silvery films produced in the He ion irradiation. However... 

The electronic stopping power involves a collision between the heavy ion nucleus and an electron of the medium. The reduced mass of the encounter can always be assumed to... 

The energy region where the electronic stopping power has its maximum value. Medium energy region. 

Fig. 8. The electronic stopping powers of polystyrene as a function of the ion kinetic energies, z is the atomic number of the projectile. The stopping powers were calculated from those of carbon and hydrogen (Northcliffe and Schilling, 1970) based on the additivity rule...

Chemical bond effects on the low-energy electronic stopping power of protons use of molecular fragments. ... 

Figure 1. The Lindhard-Scharff-Schiott (LSS) nuclear and electronic stopping powers as a function of a...

Fig. 13. Electronic stopping power as a function of the " He energy for the Si 100) direction.

The first full nonlinear calculation of the electronic stopping power of an electron gas was performed by Echenique et al. [25] in the low-velocity limit. 

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