Improved measurement of the 02+01+E0 transition strength for Se72 using the SPICE spectrometer

J. Smallcombe, A. B. Garnsworthy, W. Korten, P. Singh, F. A. Ali, C. Andreoiu, S. Ansari, G. C. Ball, C. J. Barton, S. S. Bhattacharjee, M. Bowry, R. Caballero-Folch, A. Chester, S. A. Gillespie, G. F. Grinyer, G. Hackman, C. Jones, B. Melon, M. Moukaddam, A. Nannini, P. Ruotsalainen, K. Starosta, C. E. Svensson, R. Wadsworth, and J. Williams
Phys. Rev. C 106, 014312 – Published 19 July 2022

Abstract

The selenium isotopes lie at the heart of a tumultuous region of the nuclear chart where shape coexistence effects grapple with neutron-proton pairing correlations, triaxiality, and the impending proton drip line. In this work, a study of Se72 by internal conversion electron and γ-ray spectroscopy was undertaken with the SPICE and TIGRESS arrays. New measurements of the branching ratio and lifetime of the 02+ state were performed, yielding a determination of ρ2(E0;02+01+)=29(3) milliunits. Two-state mixing calculations were performed that highlighted the importance of interpretation of such E0 strength values in the context of shape coexistence.

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  • Received 12 May 2022
  • Accepted 12 July 2022

DOI:https://doi.org/10.1103/PhysRevC.106.014312

©2022 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

J. Smallcombe1,2,*, A. B. Garnsworthy3, W. Korten4, P. Singh4, F. A. Ali5,6, C. Andreoiu7, S. Ansari4, G. C. Ball3, C. J. Barton8, S. S. Bhattacharjee3,†, M. Bowry3,‡, R. Caballero-Folch3, A. Chester3,§, S. A. Gillespie3,§, G. F. Grinyer9, G. Hackman3, C. Jones10,∥, B. Melon11, M. Moukaddam10,¶, A. Nannini11, P. Ruotsalainen12, K. Starosta7, C. E. Svensson5, R. Wadsworth8, and J. Williams7

  • 1Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
  • 2Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 9ZE, United Kingdom
  • 3TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3
  • 4Irfu, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
  • 5Department of Physics, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
  • 6Department of Physics, University of Sulaimani, Kurdistan Region, Iraq
  • 7Department of Chemistry, Simon Fraser University, Burnaby, British Colomia V5A 1S6, Canada
  • 8Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom
  • 9Department of Physics, University of Regina, Regina, Saskatchewan, S4S 0A2, Canada
  • 10Department of Physics, University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom
  • 11INFN Sezione di Firenze I-50019, Italy
  • 12University of Jyväskylä, Department of Physics, P.O. Box 35, FI-40014 University of Jyväskylä, Finland

  • *Corresponding author: smallcombe.james@jaea.go.jp
  • Present address: Institute of Experimental and Applied Physics, Czech Technical University in Prague, Husova 240/5, 110 00, Prague 1, Czech Republic.
  • Present address: School of Engineering, Computing and Physical Sciences, University of the West of Scotland, High Street, Paisley PA1 2BE, United Kingdom.
  • §Present address: National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
  • Present address: School of Computing, Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom.
  • Present address: Universitè de Strasbourg, IPHC, 23 rue du Loess, 67037 Strasbourg, France.

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Vol. 106, Iss. 1 — July 2022

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