![]() ![]() ![]() ![]() The number and energy of the X-rays emitted from a specimen can be measured by an energy-dispersive spectrometer. ![]() An electron from an outer, higher-energy shell then fills the hole, and the difference in energy between the higher-energy shell and the lower energy shell may be released in the form of an X-ray. The incident beam may excite an electron in an inner shell, ejecting it from the shell while creating an where the electron was. At rest, an atom within the sample contains (or unexcited) electrons in discrete energy levels or bound to the nucleus. Its characterization capabilities are due in large part to the fundamental principle that each element has a unique allowing a unique set of peaks on its electromagnetic (which is the main principle of ).To stimulate the emission of characteristic X-rays from a specimen, a high-energy beam of charged particles such as or (see ), or a beam of X-rays, is focused into the sample being studied. ![]()
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