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electron microprobe

   Also found in: Acronyms, Wikipedia 0.04 sec.

electron microprobe

Instrument used to determine the relative and absolute abundances of elements at a particular point within an material (such as a mineral).

The electron microprobe shoots electrons at the sample and then measures the electrons that bounce back from the sample (backscatter electrons), the electrons emitted from the sample, and X-rays that are emitted from the sample. The number of electons that bounce back is directly related to elemental mass, and each element emits a characteristic set of X-rays of different energies. The electron microprobe allows for much more detailed chemical analyses of materials than is possible by conventional chemical techniques.
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To determine what kind of stone the axes were made of, Lu used X-ray diffraction, scanning electron microscopy, and electron microprobe analysis.
In the buff: stone age tools may have derived luster from diamond by Goho, A. / Science News
With the availability of the first commercially produced electron microprobe instruments in the early 1960s, x-ray microanalysis became a significant analytical technique in the Analytical Chemistry Division at NIST (then called the National Bureau of Standards).
NIST standards for microanalysis and the certification process by Marinenko, R.B. / Journal of Research of the National Institute of Standards and Technology
The cake is examined for inclusions by metallographic and constitutional analysis that may include optical, electron microprobe and energy dispersive techniques.
Inclusions in aluminum foundry alloys by Eckert, C.E. / Modern Casting
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