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free electron

noun, Physics.
an electron that is not attached to an atom or molecule and is free to respond to outside forces.
1905-10 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for free electron
  • The voltage across a discharge tube will accelerate a free electron up to some maximum kinetic energy.
  • Three-dimensional free electron laser dispersion relation including betatron oscillations.
British Dictionary definitions for free electron

free electron

any electron that is not attached to an ion, atom, or molecule and is free to move under the influence of an applied electric or magnetic field
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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