Binding Energy


Also found in: Dictionary, Thesaurus, Medical, Acronyms, Wikipedia.

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 ?
For light atoms, when A = 2Z, obtained binding energy is very close to the actual value.
Here, there is no need to look for very high accuracy in binding energy, because this is not the purpose of the present work.
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.
Since the binding energy was positively related to the content of [(Fe + Al).
6,962,818) uses isotope-differentiated binding energy shift tags (IDBEST(TM)) to rapidly validate the levels of clinically relevant isoforms in known biomarkers in retrospective studies.
The difference of these two values, at the K-shell binding energy directly gives the K-shell cross section at K-edge.
This is the moment to push for binding energy saving targets because if the targets are not binding, they will remain pie in the sky.
Rodgers & Amunugama suggested that the calculations underestimate the binding energy in the cases of toluene and fluorobenzene, when effective core potentials (ECPs) are used for heavier alkali metals like [Rb.
Binding energy of the hydrocarbon component peak at 285 eV was used as a reference.
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.