Microscopic Mechanism of the Odd-Even Difference in Moments of Inertia of Superdeformed Bands

The large odd-even difference in moments of inertia between the SD bands l95Tl(l,2)and l96Pb(l)is investigated by the particle-number conserving method,in which the blocking effect on pairing is taken into account strictly.Theωvariation of J(2)for the three SD bands are reproduced quite well and the underlying microscopic mechanism is demonstrated clearly.Calculations show that the blocking of the proton[642]5/2 intruder orbital and the excitation of[651]1/2 intruder orbital play crucial roles for the odd-even difference in J(2)’s.