Nuclear Spin and Angular Momentum

Nuclear Spin and Angular Momentum: Nucleus consists of two kinds of particles - protons and neutrons. They are both spin 1/2 particles and have an intrinsic Spin-Angular momentum. Also, in some Nuclear models, like the Shell Model, the nucleus is assumed t o have a Central-potential field. In such a central potential, the solutions of the SE will lead to quantum numbers such as the azimuthal quantum number, thus leading to orbital Angular Momentum for these particles.
Thus, the nucleus is composed of particles that not only have spin angular momentum, but also orbital angular momentum. This contributes towards the Spin angular momentum of the Nucleus as a whole. The Nucleus then behaves as a singular particle with its own Spin Angular Momentum, that has a certain magnitude and direction that is quantised by similar rules.
Whether there is an even or odd number of protons or neutrons also plays a role in determining what is the Nuclear spin, since such particles tend to pair up with each other and cancels each others spin.

Related Video : What is Quantization of Angular Momentum?

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[munusongs]

Highest quality content in physics on YouTube

[AbhishekK-hngd]

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[accountone]

0:00 Nuclear angular momentum
2:52 Magnitude quantization of the nuclear angular momentum
3:32 Direction quantization of the nuclear angular momentum
4:19 Example: I=3/2
7:18 Determine nuclear spin (quantum number) for the ground state of a given nucleus. Pairing effect

[rampratapprajapati]

One of the best teacher having best teaching skill

[Iram]

Amazing way of explaining... best video seen till now on physics

[blissfulbeing]

What a good explanation sir....it's really interesting

[Vijay-qvzi]

there can't be any best teacher other than you. Thank you Sir..

[chauhanguruvaniclasses]

Best for all bsc and MSc students'
Thanks sir

[annedewit]

Excellent video! I like how the video cuts forward when you are drawing the diagrams so they pop up instantly. The diagram and the physical cardboard representation does a great job of giving a reasonably simple demonstration of a complicated sounding topic.

[meetkakwani]

Thanks for the beautiful video sir.
But due respect sir, I think that for ODD-EVEN and ODD-ODD nuclei cases, the values of Spin as explained by you are inconsistent with the Shell Model due to the fact that nucleons also have Orbital Angular Momentum giving the value of nuclear spin of nuclei (J or say I) much greater than 1/2 and 1.
For example: for Al nuclei with A=27 and Z=13, the value for spin is 5/2 according to the Shell Model.

[vedantdeshpande]

Thanks a lot, sir! I really like your style and used this lecture to solve of sub-question in Quantum mechanics class for the Ph.D. level course at my University in the USA. Please keep up.

[shahrukh]

Hat's off to you sir .you are really amazing and the way you were delivering your lecture was outstanding .No words for it .you deserves a lot more than this 🔥

[prof.gagandeepsingh]

Thank you sir you are giving very well explanation about spin angular momentum i have cleared 3 time net exam and 1 time gate really you are great sir maine sir pehle bhi app se baat ki hai ji thank you sir

[fidaurrahman]

your way of teaching is amazing, love from pakistan

[Toots-kc]

Excellent explanations apart from Alvin Ash… you are a gifted teacher as well ❤.

[serwan]

Nicely explained! However, the last part of your video is misleading. In the odd-odd and odd-even cases, the nuclear spin generally is not I=1/2 and I=1, respectively. Instead, it is usually significantly higher. As you mentioned in the start of your video, the protons and neutrons also can have an orbital angular momentum, which contributes as well.

[aanchalvyas]

Sir..You explain much better than anyone .. You are different 😄😊

[mahi]

Can you clear my doubts
1.) In nucleus what is revolving is this Nuleons Or nucleus itself
2.) Earth is revolving around the sun it is its orbital angular momentum then nucleus is revolving around whose?
3.) Is this visual animation of Nucleus Orbital motion and spin notion like planetary diagram
Or is this just a hypothesis or imagination

Please reply sir

[philkittler]

Best 10 Minutes I had in this topic! Thank you a lot!

[sanjayprajapati]

Thank you sir for such a basic, comprehensive & detailed lecture.