# Questions tagged [nuclear-physics]

Nuclear physics is the study of the composition, behavior and interaction of atomic nuclei and their constituent parts.

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### How am I supposed to get this answer? [on hold]

This question is from the Oxford Physics book, and I didn't understand how to get the answer. I'm assuming that the equation that I'm supposed to use E=mc^2 to solve the equation.
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### Why don't we consider the Gamow factor when configuring the cyclotron?

Most of the time, during a collision the repulsive force between the protons will beat the attractive force that binds the nucleus together and the whole thing is torn apart. But very occasionally, ...
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### Finding stable superheavy elements

Finding new stable superheavy elements is big interests in nuclear physics. Nuclides with $Z>92$ are not found in nature, but can be made artificially. Usually these nuclides become more unstable ...
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### Kinetic energy of daughter nuclei after decay given the Q value [on hold]

Assume that we know the Q value of the decay ${}^{230}_{90}\rm{Th}\rightarrow {}^{226}_{88}\rm{Ra} + \alpha$, and we make the simplification that the total mass of a nucleus is the number of nucleons ...
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### On the size of positronium

How can we simply apply the bohr model on a positronium as the positronium doesn't even have a nucleus or nucleus-like entity like in a hydrogen like atom. Moreover this implies that the first ...
0answers
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### Method for calculating nuclear magnetic moments

I am having difficulties computing the magnetic moment for an even-odd (proton-neutron) nucleus. The formula is: $$\mu_J=g_J\times j\times \mu_N$$ I checked this helpful post: When calculating ...
1answer
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### Why scattered electron waves from different parts of a nucleus interfere destructively?

We know that, $\sigma (\theta)=\sigma _M (\theta){F(q)}^2$, where $\sigma _M (\theta)$ is the scattering cross section for a point nucleus while $\sigma (\theta)$ is the observed scattering cross ...
0answers
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### Increasing total anti-neutrino cross section [duplicate]

Is there a method for increasing the total microscopic cross section for an interaction between an anti-neutrino and a nucleus of Titanium 48?
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### Increase the Inverse Beta Decay Cross Section for Ti-48

Is there a theoretical way to increase the cross section of inverse beta decay for Ti-48? This would be any method for increasing the likelyhood that Ti-48 absorbs an anti neutrino and creates Ca-48 ...
0answers
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### Need some literature recommendation - Quasi-Free electron scattering (Nuclear Physics)

I'm not sure if this is the right place for this kind of questions, but here it goes. I'm a last year undegrad and I'm currently working on a project with my professor. I just finished a smaller ...
0answers
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### Why is the electric dipole moment of the nucleus of an atom equal zero? [duplicate]

I read about the hyperfine interactions which cause the altering of the energy levels of the nuclues of an atom. Under the discussion about the electric monopole and quadrupole interactions, the term ...
2answers
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### Is there any full Compton scattering experiment done with x-ray since 1923?

The original paper of A.H.Compton 1923 did not provide data of a full experiment; he provided 3 points. Was his result corroborated by others? Can someone provide a real full set of data for Compton ...
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### Do virtual mesons exchanged between nucleons in the nuclear force ever decay before reaching the recipient nucleon?

So my understanding of the nuclear force so far is this (please correct anything I have wrong): Being a residual of the strong force, the nuclear force is mediated (in part) by the emission of ...
1answer
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### Thermodynamics of early universe - proton and neutron ratio [duplicate]

So, I have been reading about connection of particle physics and thermodynamics of early universe. Like after big bang, and quark - gluon plasma etc.. Anyway, after 1 second after big bang, the ratio ...
0answers
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### Plum-pudding atomic physics in higher dimensions?

It is established that "normal" electron orbitals are not stable in more than 3 spatial dimensions, as the available energy levels become unbounded from below. However, this result only applies given ...
2answers
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### How does the weak interaction sense the instability of a nucleus?

To reduce the disruptive energy, the weak interaction allows the number of neutrons to exceed that of protons (...) (via nasa.gov). How did it know it needs to reduce the disruptive energy? Example: ...
1answer
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### What are the conditions for nuclear decay?

I read something about that the Q-Value hast to be greater then $0$. But there must be certainly more conditions otherwise there would be nuclei that could't decay.
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### Asymmetry in p-p, n-n and n-p interactions

Why does the asymmetry exist between the proton-proton, neutron-neutron and neutron-proton strong interactions in the nucleus (which results in nuclei preferring equal numbers of neutrons and protons)?...
1answer
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### How would a nuclear explosion really operate in outer space?

(Repost from RPG.SE, per the community's suggestion.) A friend recommended I post this question here - said I'd be more likely to get a useful response than, say, from Reddit. My question is: How ...
1answer
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### Magnitude of charge and mass from cloud chamber

I was reading the anderson original article on the discovery of the positron, but I can’t figure out how he estimated the charge and mass. The paper : https://journals.aps.org/pr/pdf/10.1103/PhysRev....
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### Is it a coincidence that Big Bang nucleosynthesis lasted about one free neutron half-life?

The free neutron half-life is about 10 minutes. Big Bang nucleosynthesis, which mostly involves protons and neutrons interacting, lasted about 20 minutes. Question: Is it a coincidence that these ...
2answers
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### In beta plus decay proton gets converted to neutron— where does the extra mass come from? [duplicate]

Beta plus decay seems to be violating law of conservation of mass-energy-- when a proton changes to neutron a very small quantity of Mass is added to the right side of equation -- but where does this ...
1answer
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### How to transform activity ratio to isotope ratio? [closed]

I am given a table that describes an ancient spillage of spent nuclear fuel: ...
1answer
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### How to calculate the uncertainty of a fit function? [closed]

I'm doing research on nuclear physics. What I will be asking is actually some general question. Suppose that I have a set of data with 8 points x={x0,x2...,x7} (in my example, x-axis is transverse ...
1answer
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### Nuclear Reactivity of Water and Steam (Chernobyl)

Like many, I have become very interested in the Nuclear Disaster of Chernobyl, after the acclaimed mini-series. So I started digging around for more information. The series, of course, does not give ...
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### Beta decay of beryllium into boron: conservation of spin violated?

I found following reaction in my lecture: $$^{10}Be_{6} \rightarrow ^{10}B_5+e^{-}+\overline{\nu}_e$$ since Beryllium has an even number of protons and neutrons its nuclear spin is $0$. However, ...
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### How long is spent nuclear fuel radioactive?

I'm trying to understand the nuclear waste problem, and I've read enough to know that even the 10,000 years that the Waste Isolation Pilot Plant is licensed for is far too short to eliminate the risk ...
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### Usefulness of high molecular speeds in nuclear fusion reactions

How do molecules having speeds many times greater than mean speed help in making nuclear fusion reactions in a laboratory?
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### Neutron capture calculation

So, the problem state is: Neutron beam radiates sample A with initial number of atoms $N_0$. With neutron capture nuclei (cores) of A are transitioning to nuclei B (they are just one neutron richer ...