secondary-emission

secondary emission

noun
the emission of electrons (secondary electrons) from a material that is bombarded with electrons or ions.

Origin:
1930–35

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Collins
World English Dictionary
secondary emission
 
n
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

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
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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