Spin of 1p1n Nuclei: Theory & Explanation

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In summary, the conversation on the thread discusses the topic of 1p1n nuclear structure, specifically in the cases of deuteron, He atom, 18F, and 50V. It is noted that for the simplest case of deuteron, the Jπ (ground state) is 1+ but 0+, which is different from the atomic physics case. This is due to the spin-dependency of the nuclear force. In the case of He atom, 2 electrons create the 1S0 ground state, while for 18F, it is again 1+ despite the possibility for different spin states. 50V has a 6+ state. The question is raised if there is a theory for the
  • #1
zhangguoqiang
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I am interested in the topic of the thread
https://www.physicsforums.com/showthread.php?t=768539
,especially for those unpair 1p1n case.

As I know, for the simplest case deuteron, the Jπ (groundstate here and later) is 1+ but 0+.
This is very different to the atomic physics case. For He atom, 2 electron create the 1S0 groundstate.
For 18F, it is again 1+, although n and p are in the same orbital d5/2, which can combine the possible 0+,1+,2+,3+,4+,5+.
For 50V is 6+.

Could someone help to explain? Is there theory for the 1p1n structure?
 
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  • #2
Yes. The nuclear force is spin-dependent, so for the deuteron, the spin-1 state is lower than the spin-0 (which isn't even bound).
 
  • #3
Thanks, for 18F, is the same reason?
 

Related to Spin of 1p1n Nuclei: Theory & Explanation

1. What is the spin of a 1p1n nucleus?

The spin of a 1p1n nucleus refers to the intrinsic angular momentum of the nucleus, which is determined by the number of protons and neutrons in the nucleus.

2. How is the spin of a 1p1n nucleus calculated?

The spin of a 1p1n nucleus can be calculated using the formula: I = (N - Z)/2, where I is the spin, N is the number of neutrons, and Z is the number of protons in the nucleus.

3. What is the significance of the spin of a 1p1n nucleus?

The spin of a 1p1n nucleus plays a crucial role in determining the nuclear stability and the type of nuclear reactions that can occur within the nucleus.

4. How does the spin of a 1p1n nucleus affect its energy levels?

The spin of a 1p1n nucleus can affect the energy levels of the nucleus through the nuclear shell model, which explains the organization of protons and neutrons in energy levels or shells within the nucleus based on their spin and other quantum numbers.

5. Can the spin of a 1p1n nucleus change?

Yes, the spin of a 1p1n nucleus can change through various nuclear reactions or interactions, such as beta decay or nuclear fission, which can alter the number of protons and neutrons in the nucleus and, therefore, its spin.

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