Linked Questions

3
votes
2answers
77 views

Why is there no stable nucleus with two or more neutrons but no protons? [duplicate]

Why is there no stable nucleus with two or more neutrons but no protons?
1
vote
0answers
241 views

Can there be a two-neutron bound state? [duplicate]

Is is possible for two neutrons to be in a bound state, assuming that they only interact gravitationally?
3
votes
0answers
131 views

Why is diproton unstable? [duplicate]

Diproton is an isotope of helium without any neutrons. It commonly forms in the Sun, where protons are fused constantly. However, it is extremely unstable, and will revert back to two protons almost ...
2
votes
0answers
56 views

Why doesn't nuetron-neutron bound state exist? [duplicate]

For parallel spins, our instructor told us that it is because of pauli exclusion principle. Here is my doubt : if total spin is 1. That means spin part of wavefunction is symmetric, but if the spatial ...
18
votes
4answers
14k views

Why doesn't the deuterium nucleus have spin $0$?

A deuterium nucleus is composed of a proton and a neutron. Both have spin $\tfrac12$ so I would expect the deuterium to have two possible spins: $1$ for the triplet and $0$ for the singlet. But ...
6
votes
2answers
2k views

Can a nucleus (made of neutrons) exist without an EM field?

I understand that the EM field has an EM charge and that a nucleus made of neutrons and protons has an opposite EM charge, and this attracts. And because the electron's kinetic energy (that would ...
14
votes
1answer
4k views

What do we know about the interactions between the protons and neutrons in a nucleus?

In a nucleus, the strong nuclear force causes interactions between protons and protons, between neutrons and neutrons, and between protons and neutrons. What do we know about this interaction? ...
6
votes
3answers
2k views

What makes the number of neutrons the number of proton similar?

In basic chemistry, we are taught that an atom has roughly the same number of neutrons and number of protons, this doesn't seems to hold for larger atoms, but it is always roughly proportional (i.e. ...
1
vote
1answer
322 views

Arrangement of Nucleons due to Strong Force

I was reading up on the fundamental forces of nature and I was wondering about the arrangements of nucleons due to the strong force. Considering electromagnetic repulsion, having 2 protons "bonding" ...
4
votes
2answers
104 views

By how much are various dibaryon states unbound?

It has been known for a long time that the deuteron is stable but the dineutron (nn) and diproton (pp) are not. Many textbooks comment on this, but all the ones I found so far do not give quantitative ...
2
votes
1answer
30 views

Why n-n and p-p interaction do not exist just like n-p interaction in a deutron?

Why n-n and p-p interaction do not exist just like a bound n-p system i.e. a deutron?