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1 vote
1 answer
73 views

How does pion exchange cause protons and neutrons to be attracted to each other? [duplicate]

I read that neutron and protons are attracted through exchanging pions between each other. However, as far as I understand, they are just exchanging a meson, not any force carriers. What causes them ...
thingthingthing123's user avatar
0 votes
2 answers
66 views

What is the significance of the Strong interaction between a pair of Neutrons?

When we are introduced to the Strong Nuclear force, we are told that it prevents the nucleus from flying apart because of the electric repulsion between protons. But there is no such repulsion between ...
Deepak Joshi's user avatar
1 vote
1 answer
557 views

The difference between neutron and proton separation energy of a nucleus

For a given nucleus, why does the value of the neutron separation energy $S_n$ differ from the value of the proton separation energy $S_p$? One of the reasons that is immediately obvious is that the ...
Solidification's user avatar
8 votes
2 answers
280 views

Why are nuclei with large numbers of neutrons only stable with correspondingly large numbers of protons? [duplicate]

Large numbers of protons need to be separated by neutrons, otherwise they repel.... But why do nuclei with large of numbers of neutrons only remain stable with a relatively, correspondingly large ...
Kurt Hikes's user avatar
  • 4,509
0 votes
0 answers
36 views

Why spin-aligned nucleons bind stronger together [duplicate]

Protons bind to neutrons only if their spin is parallel to each other. Is there an easy explanation for this? What force is responsable for this spin dependence?
Anon's user avatar
  • 793
82 votes
2 answers
8k views

Why doesn't a nucleus-like body made up of just neutrons exist?

We know that neutrons exert short ranged nuclear forces over other nucleons in a nucleus, and these forces are only attractive in nature. Also this force is universal and doesn't differentiate between ...
Mehul's user avatar
  • 793
3 votes
0 answers
54 views

How can I visualize the oxygen nuclear charge density?

Oxygen has 8 protons and 8 neutrons. Based on the nuclear shell model, protons should pair with anti-parallel protons to create singlet spin states, and neutrons should similarly pair with anti-...
bobuhito's user avatar
  • 1,016
2 votes
1 answer
202 views

Pauli exclusion principle: why does it imply that $Z\approx N$ in stable nuclides with $A<40$?

I have read that when representing the possible nuclides in the $(Z,N)$ plot, the stable nuclei located on the line $N=Z$ for $A<40$, and that this is due to the Pauli exclusion principle. I have ...
Invenietis's user avatar
1 vote
2 answers
64 views

Doesn't the neutron's lack of an electric dipole moment conflict with the concept of baryons having a radius?

The proton radius puzzle appears to one of the more widely known unsolved problems in physics, but doesn't it point to a much deeper issue? Nearly all of a baryon's observed mass can be attributed to ...
QuaternionsRock's user avatar
0 votes
1 answer
209 views

Nuclear force and binding energy

What i read about binding energy is that it is the energy released when nucleus is formed due to the attraction of the strong nuclear force between nucleons. But even after the nucleus is formed, the ...
user avatar
0 votes
0 answers
27 views

'Forces' enacted by hot neutrons in fusion bomb - Pauli exclusion

Are Pauli exclusion 'forces' on a neutron 100% electromagnetic (Lennard-Jones seems more acute relationship compared to electrostatic force) If so does that neutrons have two forces between them - '...
JKB's user avatar
  • 1
1 vote
1 answer
81 views

Cold fusion with ionized hydrogen and neutron radiation

Would bombarding ionized hydrogen gas with neutron radiation cause cold fusion as the neutrons have no electrostatic repulsion to overcome therefore making it much easier to get within range of the ...
Derek Seabrooke's user avatar
2 votes
2 answers
2k views

How can neutron be converted to proton and electron?

Since a neutron and a proton are made up of quarks and an electron is a lepton, how can a neutron yield an electron?
ranjitha bc's user avatar
0 votes
2 answers
160 views

Strong force and radioactivity [duplicate]

Why does adding more neutrons to an atom unstabilise it? Won’t adding more neutrons increase the strong force and thus knit the nucleus more tightly? Or is it because it’s being added in a particular ...
user73837's user avatar
  • 381
2 votes
2 answers
577 views

Unstable vs. stable nuclei plotted on a graph

The enclosed graph shows the number of Protons on the x-axis (Z), and the number of Neutrons on the y-axis for all elements (N). Stable combinations are marked by black squares, whereas unstable ones ...
Pregunto's user avatar
  • 559

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