Shape coexistence in the neutron-deficient lead region: A systematic study of lifetimes in the even-even Hg188200 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. Svensson, J. Turko, K. Whitmore, and T. Zidar
Phys. Rev. C 100, 024301 – Published 2 August 2019

Abstract

Lifetimes of 21+ and 41+ states as well as some negative-parity and nonyrast states in Hg188200 were measured using γγ 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+/2Tl188200 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 Hg190.

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  • Received 26 May 2019

DOI:https://doi.org/10.1103/PhysRevC.100.024301

©2019 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

B. Olaizola1,*, A. B. Garnsworthy1, F. A. Ali2,3, C. Andreoiu4, G. C. Ball1, N. Bernier1,5, H. Bidaman2, V. Bildstein2, M. Bowry1, R. Caballero-Folch1, I. Dillmann1,6, G. Hackman1, P. E. Garrett2, B. Jigmeddorj2, A. I. Kilic2,†, A. D. MacLean2, H. P. Patel1, Y. Saito1,5, J. Smallcombe1,‡, C. E. Svensson2, J. Turko2, K. Whitmore4, and T. Zidar2

  • 1TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
  • 2Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada
  • 3Department of Physics, College of Education, University of Sulaimani, P.O. Box 334, Sulaimani, Kurdistan Region, Iraq
  • 4Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
  • 5Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
  • 6Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia V8P 5C2, Canada

  • *bruno.olaizola@triumf.ca
  • Present address: Nuclear Physics Institute of ASCR, 250 68 Řež. Prague, Czech Republic.
  • Present Address: Oliver Lodge Laboratory, The University of Liverpool, Liverpool, L69 7ZE, United Kingdom.

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Vol. 100, Iss. 2 — August 2019

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