Theory of ion desorption spectroscopy stimulated by positrinium formation at a solid surface
Review articleOpen access
AbstractA theory of ion desorption due to positrium formation with an electron of an adsorbate at a surface is presented. As an example, a calculation is performed for a hydrogen atom on a Si(100)2 × 1 surface; this gives a cross section that is 108 times larger than for photo-stimulated desorption. Since the cross section depends strongly on the incident positron energy, we can use it as a spectroscopic technique similar to that of diffuse LEED to determine the atomic structure of randomly adsorbed atoms or molecules on the crystal surface.
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