Packing fraction
From Mass Spec Terms
| DRAFT DEFINITION |
| Packing fraction |
|---|
| Obsolete Mass defect of an atom divided by its mass number and expressed as parts per 10,000. |
| Related Term(s): mass defect |
| Reference(s):
F. W. Aston, "Atoms and Their Packing Fractions" Nature 120, 956 (1927), http://dx.doi.org/10.1038/120956a0 |
| This is an unofficial draft definition presented for information and comment. |
References
- Aston, F.W.: Atoms and their Packing Fractions. Nature. 120, 956959 (1927); http://dx.doi.org/10.1038/120956a0
- "The most convenient and informative expression for the divergences of an atom from the whole number rule is the actual divergence divided by its mass number. This is the mean gain or loss per proton when the nuclear packing is changed from that of oxygen to that of the atom in question. It will be called the packing fraction of the atom and expressed in parts per 10,000."
- Mattauch, J.: Nuclear Binding Energies. Science. 121, 745750 (1955); http://dx.doi.org/10.1126/science.121.3152.745
- "In 1927 Aston published his measurements of the deviations of the nuclidic weights from integers in the form of a packing fraction curve that reflects the variation of the binding energy per nucleon with the number A of nucleons in the various nuclides."
- Budzikiewicz, H., Grigsby, R.D.: Mass spectrometry and isotopes: A century of research and discussion. Mass Spectrom. Rev. 25, 146157 (2005); http://dx.doi.org/10.1002/mas.20061
- Bauer, S.H.: Mass spectrometry in the Mid-1930s: Were chemists intrigued? J. Am. Soc. Mass Spectrom. 12, 975988 (2001)); http://dx.doi.org/10.1016/S1044-0305(01)00286-0
- Audi, G.: The history of nuclidic masses and of their evaluation. Int. J. Mass Spectrom. 251, 8594 (2006); http://dx.doi.org/10.1016/j.ijms.2006.01.048
