Properties of Ta187 Revealed through Isomeric Decay

P. M. Walker, Y. Hirayama, G. J. Lane, H. Watanabe, G. D. Dracoulis, M. Ahmed, M. Brunet, T. Hashimoto, S. Ishizawa, F. G. Kondev, Yu. A. Litvinov, H. Miyatake, J. Y. Moon, M. Mukai, T. Niwase, J. H. Park, Zs. Podolyák, M. Rosenbusch, P. Schury, M. Wada, X. Y. Watanabe, W. Y. Liang, and F. R. Xu
Phys. Rev. Lett. 125, 192505 – Published 6 November 2020

Abstract

Mass-separated Ta187114 in a high-spin isomeric state has been produced for the first time by multinucleon transfer reactions, employing an argon gas-stopping cell and laser ionization. Internal γ rays revealed a T1/2=7.3±0.9s isomer at 1778±1keV, which decays through a rotational band with perturbations associated with the approach to a prolate-oblate shape transition. Model calculations show less influence from triaxiality compared to heavier elements in the same mass region. The isomer-decay reduced E2 hindrance factor fν=27±1 supports the interpretation that axial symmetry is approximately conserved.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 24 July 2020
  • Accepted 13 October 2020

DOI:https://doi.org/10.1103/PhysRevLett.125.192505

© 2020 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

P. M. Walker1,*, Y. Hirayama2, G. J. Lane3, H. Watanabe4,5, G. D. Dracoulis3, M. Ahmed2,6, M. Brunet1, T. Hashimoto7, S. Ishizawa5,8,2, F. G. Kondev9, Yu. A. Litvinov10, H. Miyatake2, J. Y. Moon7, M. Mukai6,2,5, T. Niwase2,5,11, J. H. Park7, Zs. Podolyák1, M. Rosenbusch2, P. Schury2, M. Wada2,6, X. Y. Watanabe2, W. Y. Liang12, and F. R. Xu12

  • 1Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
  • 2Wako Nuclear Science Center (WNSC), Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Wako, Saitama 351-0198, Japan
  • 3Department of Nuclear Physics, RSPhys, Australian National University, Canberra, Australian Capital Territory 2601, Australia
  • 4School of Physics, and International Research Center for Nuclei and Particles in Cosmos, Beihang University, Beijing 100191, China
  • 5Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
  • 6University of Tsukuba, Tsukuba, Ibaraki 305-0006, Japan
  • 7Rare Isotope Science Project, Institute for Basic Science (IBS), Daejeon 305-811, Republic of Korea
  • 8Graduate School of Science and Engineering, Yamagata University, Yamagata 992-8510, Japan
  • 9Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
  • 10GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
  • 11Department of Physics, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
  • 12School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China

  • *p.walker@surrey.ac.uk

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 125, Iss. 19 — 6 November 2020

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×