Thursday, January 31, 2019

CHEM 418 Nuclear Chemistry, Winter 2019: Lecture 8 Nuclear Force, Structure, and Models

This lecture provides information on nuclear force and nuclear models. The strong force is introduced through isospin. A comparison of exchange particles is provided. The use of mirror nuclei to examine the strong force is presented. An overview of nuclear potentials is provided and used to discuss the shell model. States of the shell model and their relationship to magic numbers are discussed. Use of the shell model is determine nuclide spin and parity is presented. The relationship between spin and parity with nuclear deformation is introduced with Nilsson diagrams. Additional information on Nilsson diagrams can be found in the Table of the Isotopes. An introduction of the Fermi model for energetic nuclei is given. The lecture length is 53 minutes.
The lecture is assigned on Thursday 31 January 2019 and due Tuesday 5 February 2019.  When you have completed the lecture please respond to the Lecture 8 PDF quiz.  The answers to the Lecture 8 PDF quiz will be posted Wednesday 6 February 2019.

29 comments:

  1. Quiz 8 is completed.

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  2. Quiz 8 has been submitted.

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  3. thanks for all the comments and quizzes!

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  4. For question 2 use the shell model to determine the spin and parity. The result for some of the nuclei will be different than the chart of the nuclides.

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  5. I've submitted quiz 8

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  6. Quiz 8 has been submitted through canvas

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  7. Submitted quiz through Canvas and form.

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  8. My submission will probably be late. I am still trying to work on question 2 using the shell model since I had used the chart of nuclides earlier.

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  9. Submitted with both email and canvas upload!

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  10. watched and submitted!

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  11. My submission will be late, still working through number 2.

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  12. Submitted the quiz! It's interesting how the shell model results in half of the isotopes having differing spins and parity compared to what is listed on the chart of nuclides.

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    1. If I had selected lower Z isotopes this difference would not have been so great. The shell model is based on spherical nuclei. With non-spherical nuclei spin and parity difference between the shell model and measurements occur.

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  13. Thanks for all your comments and quizzes.

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