Shape coexistence in the neutron-deficient lead region: a systematic study of lifetimes in the even-even 188-200Hg with the GRIFFIN spectrometer at TRIUMF

B. Olaizola*, A.B. Garnsworthy, F.A. Ali, C. Andreoiu, G.C. Ball, N. Bernier, H. Bidaman, V. Bildstein, M. Bowry, R. Caballero-Folch, I. Dillmann, G. Hackman, P.E. Garrett, B. Jigmeddorj, A.I. Kilic, A.D. Maclean, H.P. Patel, Y. Saito, J. Smallcombe, C.E. SvenssonJ. Turko, K. Whitmore, T. Zidar

*Corresponding author for this work

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Abstract

Lifetimes of 21+ and 41+ states as well as some negative-parity and nonyrast states in 188-200Hg were measured using γ-γ electronic fast timing techniques with the LaBr3(Ce) detector array of the GRIFFIN spectrometer. The excited states were populated in the ϵ/β+ decay of Jπ = 7/2- 188-200Tl produced at the TRIUMF-ISAC facility. The deduced B(E2) values are compared to different interacting boson model predictions. The precision achieved in this paper over previous ones allows for a meaningful comparison with the different theoretical models of these transitional Hg isotopes, which confirms the onset of state mixing in 190Hg.
Original languageEnglish
Article number024301
JournalPhysical Review C
Volume100
Issue number2
DOIs
Publication statusPublished - 2 Aug 2019
Externally publishedYes

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