This lecture provides supplemental information on the shell model and nuclear force. 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, page H-6. The lecture time is 40 minutes.
Lecture completed and pdf quiz submitted. Interesting that doubly magic Tin-132 (40 sec 1/2 life) is so unstable, but I guess without that alot more unstable..like Tin-133 (1.4 sec 1/2 life). The way ORNL bombarded a deuterated target with Tin-132 to investigate it was pretty clever.
ReplyDeletethat is exactly correct. The enhanced stability due to the double magic nucleus increases a short half-life to something longer.
DeleteLecture complete and quiz submitted. I'm not sure about estimating deformity from spin and parity from the shell model, or is it calculated from the observed states?
ReplyDeleteFrom our point of view we can estimate deformity by comparison of measured and calculated spin. If they differ then we can assume the nucleus is deformed.
DeleteI'm having a difficult time to determine spin and parity in Oblate or Problate region. I'll practice in this area this weekend and i'll let you if i need your help.
ReplyDeleteThis is rather complicated and takes some practice. We can meet on this or hold a Skype discussion.
Delete