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packing fraction

noun

  1. 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.

packing fraction

noun

  1. 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

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.

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Word History and Origins

Origin of packing fraction1

First recorded in 1925–30
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Example Sentences

Examples have not been reviewed.

For one, there’s the idea of packing fraction: If you pack balls into a volume, they can’t fill all the space.

From

This small fraction, called the packing fraction, becomes energy.

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