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.
I finished the lecture and the Quiz but I'm still a little confused on the how to identify the shape of the nuclei based on the deformation with the Nilsson diagram. Since the Quiz only asked for the isotopes that were non-spherical, I chose the ones that did not have the same spin and parity from the shell model vs. the chart of the nuclides.I still don't quite understand how to discern prolate vs. oblate or if I did the second question correctly. I know oblate relates to a negative deformation (prolate the opposite) but I'm not sure how that relates to the spin and parity of the given isotope.
ReplyDeleteyou can tell if a nucleus is deformed from the spin and parity, but not the shape. If the spin and parity are different from the shell model, and the shell model is based on spherical nuclei, then all one can really say is the nucleus is not spherical. The Nilsson diagram can be used to see what shapes relate to the observed spin and parity. From this one may be able to determine if the nucleus is oblate or prolate.
DeleteGreat question.
I have finished and e-mailed the quiz. For 156Tb I included both possible answers for the spin and parity since the sum of the l numbers is odd.
ReplyDeletethat is fine.
DeleteI've finished both the lecture and quiz. Do we need to sign the quiz once we've completed it? I just don't have an electronic signature on it so I wasn't sure.
ReplyDeleteno worries about the electronic signature. do so if you can.
DeleteJust finished the lecture and quiz.
ReplyDeletethanks!
DeleteJust finished the lecture and quiz.
ReplyDeletethanks again!!
DeleteLecture done and quiz sent off
ReplyDeleteI did not get the quiz yet.
DeleteFinished the lecture and quiz, I did the same thing as Kevin and put both possible values for 156Tb as well.
ReplyDeleteJust submitted the quiz.
ReplyDeleteJust finished the lecture and quiz.
ReplyDeleteSo I did it again with thinking this was due on the 16th. The chapter wasn't too hard. We're actually covering this in p-chem 2 right now as well.
ReplyDelete