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packing fraction

Physics. a measure of the stability of an atomic nucleus, equal to 10 4 multiplied by the mass defect and divided by the mass number.
1925-30 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for packing fraction
  • Shortening the beam tube lengths to their acceptable minimum to improve the packing fraction.
  • In general, the efficiency and resistance both increase as the fiber diameter decreases or packing fraction increases.
  • The well-known spatial variation of packing fraction near the outer boundary of a pebble-bed reactor core is cited.
British Dictionary definitions for packing fraction

packing fraction

a measure of the stability of a nucleus, equal to the difference between its mass in amu and its mass number, divided by the mass number
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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packing fraction in Science
packing fraction
  1. The ratio of the total volume of a set of objects packed into a space to the volume of that space.

  2. The difference between the isotopic mass of a nuclide and its mass number, divided by its mass number. The packing fraction is often interpreted as a measure of the stability of the nucleus.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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