Quadrupole pairing and downturn of moment of inertia for the superdeformedband Hg-194(1) - art. no. 067303

The omega variation of moments of inertia of superdeformed bands is investi gated by a particle-number conserving (PNC) method of the cranked shell mod el Hamiltonian with monopole and quadrupole pairings. The observed omega de pendence of the moments of inertia for Hg-192,Hg-194(1), particularly the s hift in J((2)) downturn for Hg-194(1) to a higher frequency, are well repro duced by the PNC calculation. The microscopic mechanism of the omega depend ence of J((2)) (contribution to J((2)) from each cranked Nilsson orbital) i s clearly exhibited in the PNC calculation. The shift of the J((2)) downtur n for Hg-194(1) is mainly attributed to the protons in the N = 6 intruder o rbitals under the influence of Q(20) quadrupole pairing.