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impact parameter

noun, (in nuclear physics)
the perpendicular distance from the original center of a set of scattering particles to the original line of motion of a particle being scattered. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for impact parameter
  • Trivial geometric ambiguities such as impact parameter choice must be avoided.
  • If they approach within an impact parameter of another particle then both particles are given a random displacement.
  • The values of each impact parameter on the inventory table were multiplied by the values of equivalency factor correspondents.

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