# 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.

252 questions
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### why does the brehmsstrahlung continuum of a particular anode material extend beyond the k-alpha and k-beta energy level of that material?

I was looking at the excitation spectrum of a few elements in the first page of this document: http://www.amptek.com/pdf/Choosing%20the%20anode%20material%20in%20an%20x-ray%20tube.pdf In particular I ...
627 views

### Calculating the unified atomic mass unit [duplicate]

The masses of electron, proton and neutron (in SI units) are (approx.): $$m_e=\text{electron mass}=9.109\times 10^{-31}\ \text{kg}$$ m_p=\text{proton mass}...
352 views

### Why does fusion use mass for energy?

I have the basic idea: for small nuclei the mass of product is less than the mass of the individual pieces, this mass is released as energy via $E=mc^2$. But why do nuclei use the mass for energy? ...
237 views

### Can daughter nuclei from fission be lighter than Fe-56?

In a typical nuclear fission reaction, a heavy nucleus decays into daughter nuclei which are lighter and have higher binding energy per nucleon. For example: ...
479 views

### When does semi-empirical mass formula break down?

When does the semi-empirical mass formula stop working and what are its limitations? Is it when the difference in $N$ and $Z$ becomes large or when atoms become too big?
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### Comparison between Bethe-Weizsäcker-Model for the nuclear binding energy and measurements

I tried to compare the binding energies of between the measured data and the Bethe-Weizsäcker model. My plot looks like this and I don't understand the large discrepancy: For the measurement I used ...
1k views

### Where does mass deficit energy go?

I get the idea (at least, as much as a layperson can) that a helium nuclei has less mass than the sum of its parts. That mass deficit is turned into energy. At this stage I feel like I've heard two ...
5k views

### Why is the total energy of an electron in an atom negative? [duplicate]

Why is the total energy of an electron in an atom negative? We know that $$E = -\frac{e^2}{8\pi\epsilon_0a_0}.$$ What does the negative sign in the above equation means?
3k views

### Calculating energy released by using binding energy VS mass difference

Please take a look at (C). I have no prob with (a) and (b) but some values are needed from (a) and (b) in order to perform a calculation in (C). For (C), I wonder why I got different answers from two ...
504 views

### Alpha decay condition using semi-empirical mass formula

I have to find a equation of Z as a function of A, where Z denotes the atomic number and A denotes the mass number of an atom, for odd-even nucleii which can barely undergo alpha decay (by themselves) ...
475 views

### Can heavy elements be fused? [duplicate]

Yes, I know, in stars, fusion occurs up to Iron(-56); but, I want to know if fusion past this nucleus can happen at all. If so, the daughter element would move to the right of the peak and its ...
556 views