# Questions tagged [binding-energy]

Please use binding energy in the context of the atomic scale and/or atomic systems. This can be used in nuclear reactions.

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### What is more massive, Proton, standard Hydrogen?

If you consider the classical states of hydrogen, one in which the electron is rotating at an orbital distance of $r$ and then take $\lim_{r\to\infty}$ one obtains that the $r_\infty$ state has more ...
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### What is the binding energy between conduction band and valence band of metals and insulators?

As far as my understanding of solid state physics goes, I can't see a clear connection between binding energy and band gap. But our teacher asked us the question as an assignment but i really can't ...
209 views

### Accurate Equation for Earth's Gravitational Binding Energy

This is a relatively important question for anyone who can answer it. I am trying to find the equation that accurately solves for Earth's Gravitational Binding Energy. The information below is from ...
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### Binding Energy and Energy Mass Equivalence

Consider a neutral atom. An external force acts on one of its valence electron so that it brings this valence electron to infinity away from the rest of the atom. The electron's kinetic energy does ...
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### Relationship between binding energy of atoms in a solid and compressibility defined by bulk modulus

Consider an atom which has η nearest neighbours. The equilibrium binding energy $L_0$ of $N$ atoms is: $$L_0 = \frac{Nηϵ}{2}$$ The bulk modulus $K$ of a solid of volume $V$ compressed under pressure ...
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### Why bound states in QFT have higher mass than single particle states?

In standard textbooks in QFT while discussing e.g. the Kallen-Lehmann formula (see e.g. Section 7.1 in the Peskin-Schroeder book) it is always assumed that bound states of two or more particles have ...
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### How fast do nuclei need to be traveling when colliding for them to break apart? [closed]

I don't mean fission or fusion reactions with uranium or such. I mean gold or lead or even hydrogen collisions, such as in these particle colliders or outer space, wherein the nuclei seem to touch, ...
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### Binding energy of the nucleus

In a reaction U235+1n->141 Ba +92Kr +(3) 1n+200MeV, the energy released (200Mev) is of one atom or of 6.023*10^23 atoms?
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### Feshbach -Resonance why are hyperfine structures important?

The hyperfine structure of energy levels around the ground state seem to enable Feshbach and be intrinsic to it. Why do we need hyperfine levels? I.e. why is Feshbach specific to ultracold atoms in ...
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### Difference between Annihilation and Mass defect

I just need to clear something up. As I understand it, the mass defect of a system is the result of a loss of potential energy of a system. So (for example) when a nucleus forms, energy is released, ...
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### Does the annihilation of antihydrogen with heavier matter resulting in conversion of heavier elements back to hydrogen?

If an antihydrogen atom annihilate with a heavier atom of matter, will the remaining nucleus of the heavier atom be disassembled into individual protons and neutrons? If so, is this considered to be ...
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### Highest Binding Energy per Nucleon

According to Wikipedia Isotope of nickel has the highest binding energy per nucleon. But according to a statement in the standard textbook of our country it is said that Fe has the highest binding ...
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### Why do different elements have different number of isotopes?

For example: Carbon-12,Carbon-13 and Carbon-14 are three isotopes of the element carbon with mass numbers 12, 13 and 14 respectively. Lithium-6 and Lithium-7 for lithium,etc. My question is that are ...
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### Why nuclear fusion deliver energy instead of taking? [duplicate]

In nuclear physics, when you break eg. a nucleus of Uranium, some neutrons are liberated, and the original atom degrades to a lighter element. The energy that was used to keep these subatomic ...
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### What is the theoretical efficiency of fusion?

What is the theoretical limit of the amount of energy that can be extracted from a fusion reaction? I am not talking about the practical efficiency of a reactor, but rather what fraction of the mass-...
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### Why is there a difference in measured binding energy vs formula for binding energy? [closed]

I have a question about calculating the energy release from a fusion reaction. With parameters I have been supplied the liquid drop model semi-empirical binding energy formula gives the wrong answer. ...
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### What happens if the bound electron of hydrogen atom gains kinetic energy exceeds binding energy?

Say a hydrogen atom is accelerated so that both the nucleus and the bound electron gains kinetic energy exceeding it's electron binding energy, yes I know an hydrogen atom with 1 proton, 1 neutron and ...
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### Calculating binding energy of a molecule

To calculate binding energy of an atom we find difference between the mass of whole nucleons that constitute that atom and the experimental mass of the atom from tables. But, to calculate the binding ...
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### In physics sometimes we find energy that is negative. What does the negative sign indicate?

Sometimes we see energy that is negative, for example, the energy of an electron in orbit. We know energy is something that can do something. In this view does negative energy mean something opposite ...