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delta ray

noun, Physics.
a low-energy electron emitted by a substance after bombardment by higher-energy particles, as alpha particles.
1905-10 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for delta ray
  • The default straggling model was changed to restricted energy losses including delta ray production.
British Dictionary definitions for delta ray

delta ray

a particle, esp an electron, ejected from matter by ionizing radiation
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for delta ray

in physics, any atomic electron that has acquired sufficient energy by recoiling from a charged particle passing through matter to force, in turn, some dozens of electrons out of other atoms along its own trajectory.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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