Other Spectroscopic Methods Using The Same Principle
It is also possible to create a characteristic secondary X-ray emission using other incident radiation to excite the sample:
- electron beam: electron microprobe (or Castaing microprobe);
- ion beam: particle induced X-ray emission (PIXE).
When radiated by an X-ray beam, the sample also emits other radiations that can be used for analysis:
- electrons ejected by the photoelectric effect: X-ray photoelectron spectroscopy (XPS), also called electron spectroscopy for chemical analysis (ESCA)
The de-excitation also ejects Auger electrons, but Auger electron spectroscopy (AES) normally uses an electron beam as the probe.
Confocal microscopy X-ray fluorescence imaging is a newer technique that allow control over depth, in addition to horizontal and vertical aiming, for example, when analysing buried layers in a painting.
Read more about this topic: X-ray Fluorescence
Famous quotes containing the words methods and/or principle:
“Commerce is unexpectedly confident and serene, alert, adventurous, and unwearied. It is very natural in its methods withal, far more so than many fantastic enterprises and sentimental experiments, and hence its singular success.”
—Henry David Thoreau (1817–1862)
“Why does philosophy use concepts and why does faith use symbols if both try to express the same ultimate? The answer, of course, is that the relation to the ultimate is not the same in each case. The philosophical relation is in principle a detached description of the basic structure in which the ultimate manifests itself. The relation of faith is in principle an involved expression of concern about the meaning of the ultimate for the faithful.”
—Paul Tillich (1886–1965)