Binding Energy


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binding energy

[′bīn·diŋ ¦en·ər·jē]
(physics)
Abbreviated BE. Also known as total binding energy (TBE).
The net energy required to remove a particle from a system.
The net energy required to decompose a system into its constituent particles.

Energy, Binding

 

(also separation energy), the energy of any bound system of particles (such as an atom) equal to the work required to decompose the system into constituent particles such that they are an infinite distance from each other and cannot interact. It is a negative quantity, since energy is released in the course of the formation of the bound state, and its absolute value characterizes the bond strength (for example, the stability of nuclei).

According to the Einstein relation, the binding energy is equivalent to the mass defect Δm: ΔE = Δmc2, where c is the velocity of light in a vacuum (seeMASS DEFECT). It is determined by the type of interaction between the particles in a given system. Thus, the binding energy of the nucleus is due to the strong interactions of the nucleons in the nucleus (in the more stable nuclei of intermediate atoms, the specific binding energy is ~8 × 106 electron volts [eV]). The energy may be released when light nuclei fuse into heavier ones, as well as upon the fission of heavy nuclei, which is explained by the decrease of the specific binding energy with increasing atomic number.

The binding energy of electrons in an atom or molecule is determined by the electromagnetic interactions, and for each electron it is proportional to the ionization potential; it is equal to 13.6 eV for an electron of the hydrogen atom in the normal state. These same interactions are responsible for the binding energy of atoms in a molecule or crystal. In the case of the gravitational interaction, the binding energy is ordinarily small; however, it may be of considerable magnitude for certain celestial objects, such as black holes.

References in periodicals archive ?
Assuming that Unruh radiation is able to push on particles, and that the proton can block it, predicts an extra proton-muon binding energy of 180 [micro]eV, about 55% of the observed anomaly.
The lowest binding energy was obtained for the wild type followed by L373 F natural variant.
We applied this technique to the determination of fundamental parameters for UA-QCMD and we reported our data on binding energy computed with COLORS as well as data from DFT and thermodynamics in Tables 1 and 2.
Results of molecular docking study (Table 3) showed that the logarithm of free binding energy of dihydrotanshinone (-9.
The modified parameter [alpha]' as defined above is then independent of hv and always positive, and it is the sum of the kinetic energy of the Auger signal and the binding energy of the photoelectron line.
Considering the gradual change of binding energy and photoemission intensities with temperature, the distribution of defects contributing to the semiconductor properties of P3HT must be fairly isotropic.
In the P2p spectrum (Figures 3a and 3e), one component is seen with a binding energy of 134.
The lower binding energy limit was determined from the lowest energy x-ray line that could be detected using an ultra thin window or windowless detector, that is about 150 eV.
Both calculations demonstrated that the binding energy of the ground state is infinite.