Date of Defense
As a projective or atom moves through a solid, there will be collisions with the atoms of the solid. Vacancies in the electron shells of either the projective or target atom can be produced during these collisions by various interaction mechanisms which excite an electron to a higher shell or eject it from the atom. In particular, vacancies in the K shell - the most tightly bound shell, or n = 1 - can be produced. These vacancies can decay either by having a higher shell electron fall into the vacancy, releasing either a photon or an auger electron, or by capturing a free electron with a subsequent release of either radiation or a particle. For K vacancies the radiation released will be in the x-ray wavelength region.
Guiter, Steven M., "Thickness Effects on X-Ray Yields per Particle in 40 MeV C2 on Ge Collisions" (1979). Honors Theses. 271.
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