Semi-empirical mass formula
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 A graphical representation of the semi-empirical binding energy formula. The binding energy per nucleon in MeV (highest numbers in dark red, in excess of 8.5 MeV per nucleon) is plotted for various nuclides as a function of Z, the atomic number (on the Y-axis), vs. N, the atomic mass number (on the X-axis). The highest numbers are seen for Z = 26 (iron). |
In nuclear physics, the semi-empirical mass formula (SEMF) (sometimes also called Weizsäcker's formula, or the Bethe-Weizsäcker formula, or the Bethe-Weizsäcker mass formula to distinguish it from the Bethe–Weizsäcker process) is used to approximate the mass and various other properties of an atomic nucleus. As the name suggests, it is based partly on theory and partly on empirical measurements. The theory is based on the liquid drop model proposed by George Gamow, which can account for most of the terms in the formula and gives rough estimates for the values of the coefficients. It was first formulated in 1935 by German physicist Carl Friedrich von Weizsäcker, and although refinements have been made to the coefficients over the years, the structure of the formula remains the same today.
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| Nuclear liquid drop model Nuclear liquid drop model hyperphysics.phy-astr.gsu.edu/hbase/nuclear/liqdrop.html - Web |
| The semi-empirical mass formula The semi-empirical mass formula www.phy.uct.ac.za/courses/phy300w/np/ch1/node22.html - Web |
| Liquid drop model Liquid drop model hyperphysics.phy-astr.gsu.edu/hbase/nuclear/liqdrop.html - Web |
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| Liquid drop model with parameter fit Liquid drop model with parameter fit www.phys.jyu.fi/research/gamma/publications/akthesis/node4.html - Web |
