the emission of electrons (secondary electrons) from a material that is bombarded with electrons or ions.
secondary emission
(physics) the emission of electrons (secondary electrons) from a solid as a result of bombardment with a beam of electrons, ions, or metastable atoms: used in electron multipliers
secondary emission
The emission of electrons or ions from a material, caused by collisions of electrons or other charged particles with the material. Electron multipliers, photomultipliers, and Geiger counters all work by means of secondary emission.


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