Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8197003 | Physics Letters B | 2007 | 7 Pages |
Abstract
The spectroscopic quadrupole moments of the 11â and 12+ isomers in 192,194Pb, described by the 3s1/2â21h9/21i13/2 intruder two-proton and 1i13/22 two-quasineutron configurations, respectively, have been determined by the method of time-differential observation of the γ-ray perturbed angular distribution. The derived values are |Qs|(12+,192Pb) = 0.32(4) eb, |Qs|(11â,192Pb) = 2.9(3) eb and |Qs|(11â,194Pb) = 3.6(4) eb. The 8+ 2304 keV and 9â 2514 keV states in 192Pb have been identified as isomers, with half-lives of 3.9(3) and 3.3(2) ns, respectively. The experimental spectroscopic quadrupole moments for the 11â and 12+ isomers in neutron deficient Pb nuclei have been described in the framework of the pairing plus quadrupole model. The intrinsic quadrupole moments and deformation of the 11â isomers are compared with the predictions of mean-field and interacting boson models.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
M. Ionescu-Bujor, A. Iordachescu, N. MÇrginean, C.A. Ur, D. Bucurescu, G. Suliman, D.L. Balabanski, F. Brandolini, S. Chmel, P. Detistov, K.A. Gladnishki, H. Hübel, S. Mallion, R. MÇrginean, N.H. Medina, D.R. Napoli, G. Neyens, P. Pavan, N. Vermeulen,