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Lifetimes of intruder states in 186Pb, 188Pb and 194Po

Abstract : Lifetimes of prolate intruder states in 186Pb and 188Pb and oblate intruder states in 194Po have been determined through recoil distance Doppler-shift lifetime measurements. Deformation parameters of |β2| = 0.29(5) and |β2| = 0.17(3) have been extracted from experimental B(E2) values for the prolate and the oblate bands, respectively. The present study addresses the phenomenon of shape coexistence typical for the nuclei near Z = 82 and N = 104, providing information on configuration mixing of intrinsic structures of the nuclei of interest. The results are compared with the available lifetime data and theoretical results for neutron-deficient Po, Pb, Hg and Pt nuclei. Furthermore, new self-consistent mean-field calculations have been carried out for 194Po.
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http://hal.in2p3.fr/in2p3-00293070
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Submitted on : Thursday, July 3, 2008 - 5:35:38 PM
Last modification on : Monday, February 10, 2020 - 6:12:41 PM

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T. Grahn, A. Dewald, O. Möller, R. Julin, C.W. Beausang, et al.. Lifetimes of intruder states in 186Pb, 188Pb and 194Po. Nuclear Physics A, Elsevier, 2008, 801, pp.83-100. ⟨10.1016/j.nuclphysa.2008.01.002⟩. ⟨in2p3-00293070⟩

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