Shape Coexistence in Pb Nuclei Probed by Static Electromagnetic Moments.

Authors :: Ionescu-Bujor, M.
Iordachescu, A.
Marginean, N.
Ur, C. A.
Bucurescu, D.
Suliman, G.
Rusu, C.
Balabanski, D. L.
Bazzacco, D.
Brandolini, F.
Chmel, S.
De Poli, M.
Hübel, H.
Medina, N. H.
Neyens, G.
Pavan, P.
Ribas, R. V.
Rossi Alvarez, C.
Source :: AIP Conference Proceedings; 2006, Vol. 831 Issue 1, p278-282, 5p, 1 Chart, 4 Graphs
Publication Year :: 2006
Abstract: Spectroscopic quadrupole moment measurements for high-spin isomeric states in 192,193,194Pb nuclei have been performed by the time-differential perturbed γ-ray angular distribution method. The quadrupole moments of the isomers described by quasineutron configurations in neutron-deficient Pb nuclei are well reproduced by the pairing plus quadrupole model, which predicts for these states a very small prolate deformation β2 ≈0.02. The quadrupole moment of the 11- isomeric state in 192Pb involving the π(3s<subscript>1/2</subscript><superscript>-2</superscript> 1h<subscript>9/2</subscript> 1i<subscript>13/2</subscript>) configuration corresponds to a deformation β2=-0.11(1). The quadrupole moments of the proton intruder states in Pb nuclei are compared with theoretical predictions of tilted-axis cranking, mean-field and interacting boson models. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]