packing fraction


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packing fraction

[′pak·iŋ ‚frak·shən]
(nuclear physics)
The quantity (M - A)/ A, where M is the mass of an atom in atomic mass units and A is its atomic number.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The relationship between enrichment and packing fraction for FCM-type fuel is listed in Figure 6.
A good fit of the evolution of the new factor [a.sub.[phi]] was obtained with the Krieger-Dougherty law with a value of 33% for the maximum packing fraction and of 2.5 for the exponent [[eta]][[phi].sub.max].
Tablet properties such as mechanical strength, tablet packing fraction, and disintegration are in turn affected by the porosity [25].
The modeling helps in studying the effects of various parameters such as the grain size, the packing fraction, and the gap between neighbouring metal particles, on the effective constitutive properties of the copper powders at both 2.45 GHz and 30 GHz, which are the two most commonly used frequencies for the microwave sintering of the metal powder compact.
The packing fraction for this state is about 64 percent.
The energy change produced by packing together subatomic particles in a nucleus was called the packing fraction. Since it represented the energy binding the particles together, it could also be called the binding energy.
Despite the simplicity of the model it appears very complex especially if the packing fraction of spheres is high.
The best fit with experimental data was obtained for the maximal packing fraction [f.sub.m] = 0.54 using the Krieger-Dougherty model.
This is illustrated in table 5 for light and medium trucks using two-cord constructions and assuming an 85% linear cord packing fraction. PEN, with a tenacity of 8.3-8.4 g/d (7.3-7.4 cN/dtex), should work well for both applications.
The researchers also demonstrated that this packing fraction seems to determine the onset of dilatancy, an important property of granular materials such as sand.