Ion scattering experiments

Figure 4.13 Geometry of an ion scattering experiment. An incident ion with mass M-m and energy Ej collides with a sample atom of mass A/s and loses energy. Its final kinetic energy E, after scattering over an angle Bis a measure of the mass of the target atom.

For example, [94] reports a direct process for investigating ZnO polarity based on the analysis of time-of-flight spectra in ion-scattering experiments low-energy ion beams are scattered over the surface of the layer, causing it to be sputtered by the ion bombardment. The detector allows the time-resolved detection of the Zn-particle stream and of the scattered primary ions. The extent of O termination and Zn termination for the layer can be calculated from the difference between these signals. 

So far, only a limited number of surfaces have been investigated for surface melting, but this is certainly a field where ion-scattering experiments have made a very substantial contribution. 

The simplest expression for the measured yield in an ion scattering experiment is given by... 

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