Nuclear Collective Motion: Vibrations and Rotations. Lecture 13

Here we deduce nuclear vibrations from the harmonic oscillator and nuclear rotations from the total energy of the rigid rotor, which assumes that the distance between particles remain the same (i.e. V=0). Hence, we quantize the classical kinetic energy and obtain the eigenvalues for the rigid rotor. In nuclear physics, this is called the rotational flow model to avoid the implication that nucleons are frozen in position. Although this is an idealization, the excitation energies nicely match the predicted J(J+1) pattern, which characterizes the excitation of deformed nuclei in the mass 180 region and the rare earth.

[@saikatsen9661]

Can you please tell about gamma vibration in nuclei?? Or can you refer me any book or article where i can found this.. actually i am unable to visualize it!!

[@NicoOrce]

I don't think they really exist. What the nucleus actually does is to rotate about the three axes when it has a triaxial deformation, which seems to be the case more often than we think.

[@haexuvissplynderae1543]

the rigid rotor energy is quadratic in J. so for equal incremental steps in J, the energy absolute increments increase linearly ( J(J+1) - (J-2)(J-1) = 4J-2 ). the resonance spikes should hence get sparser and sparcer as we get to higher energies. why are your spikes equally distant? are you plotting the energies in logarithmic scale?

[@NicoOrce]

Sorry for the late reply. Thanks for asking. The quadratic increment refers to the excitation energy of the level/state. Those in the spectrum are gamma-rays, i.e., the energy difference between the levels! ;-)

[@2tehnik]

Nico Orce will NEVER be ballin' [27:55] WHAT THE FRICK??1!!??!!?!

[@NicoOrce]

😂 will reply to your questions this week😊

[@abdalqadirmohammed8867]

hi sir i am a student at delhi university doing msc. how can i get your book(lecture notes)

[@NicoOrce]

I am in the process of getting it finished. Thanks for asking! :-)

[@abdalqadirmohammed8867]

Thank you very much for replying. Is there a way to get that notes that you have taught in this course?