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Glossary terms about Proton

A stable elementary particle that occurs in the nuclei of all atoms. The proton has a positive charge equal in magnitude to that of the electron.

5 pages mention Proton

Background information - What is energy dispersive X-ray spectroscopy?
Characteristic X-rays
The atoms of each element in the sample consist of a nucleus made up of neutrons and positively charged protons, and a cloud of negatively charged electrons that surrounds the nucleus. 
The input beam may comprise light (including laser beams), X-rays and other electro-magnetic waves, electrons, protons or ions. 
Quantitative EDS X-ray microanalysis using SEM
X-ray detection by EDS