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Electron ionization

 Home Physics Subfields of physics Applied and interdisciplinary physics Accelerator physics Ion source
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Electron ionization (EI) is a technique commonly used in mass spectrometry for ionizing chemical species. In this process, a sample is bombarded with high-energy electrons, typically with energies around 70 electron volts (eV). The interaction between the incoming electrons and the molecules of the sample causes the molecules to lose an electron, resulting in the formation of positively charged ions.

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