secondary emission

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

1930–35 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
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

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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The electrons quickly multiply through secondary emission.
Secondary emission is the emission of electrons from a material when bombarded by primary electrons.
The high electron energy causes secondary emission effects.
The cost effectiveness of adding secondary controls can be illustrated by looking at two types of secondary emission control.
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