Example 5. Calculate the energy difference between the Idy and the If, neutron shells ie., the vey gap corresponding to neutron number 20. Given that the masses of ? Ca, 26 3 Ca are Ca and 962589 u, 40.962275 u and 38.970691 u, respectively.A = (B.E.) - (B.E.), = 15.62 - 8.36 = 7.26 Mev. Example 6. The first four excited states of 29"Pb are as shown in Fig. 9.16. Using the single particle mode, explain the spectrum. ic doubly magic. Theits. Example 7. Determine the harmonic oscillator frequencies @ appropriate to the nuclei "O and 60N; The total single particle energies in a nucleus of mass number A areExample 8. With the help of the exclusion principle argument and the Mayer and Jensen scheme of the levels predicted by extreme single particle model, predict the ground state spins of the following nuclei