Triaxial deformation and nuclear shape transition in 192Au

Y. Oktem, D. L. Balabanski, B. Akkus, L. Amon Susam, L. Atanasova, C. W. Beausang, R. B. Cakirli, R. F. Casten, M. Danchev, M. Djongolov, E. Ganioğlu, K. A. Gladnishki, J. Tm. Goon, D. J. Hartley, A. A. Hecht, R. Krücken, J. R. Novak, G. Rainovski, L. L. Riedinger, T. Venkova, I. Yigitoglu, N. V. Zamfir, and O. Zeidan
Phys. Rev. C 86, 054305 – Published 12 November 2012

Abstract

Background: Nuclei in the A190 mass region show gradual shape changes from prolate through nonaxial deformed shapes and ultimately towards spherical shapes as the Pb region is approached. Exploring how this shape evolution occurs will help us understand the evolution of collectivity in this region.

Purpose: The level scheme of the 192Au nucleus in A190 region was studied in order to deduce its deformations.

Methods: High-spin states of 192Au have been populated in the 186W(11B, 5n) reaction at a beam energy of 68 MeV and their γ decay was studied using the YRAST Ball detector array at the Wright Nuclear Structure Laboratory (WNSL), Yale University.

Results: Based on double and triple γ-ray coincidence data the level scheme of 192Au has been extended up to Iπ=32+ at an excitation energy of 6 MeV.

Conclusion: The results are discussed in the framework of pairing and deformation self-consistent total Routhian surface (TRS) and cranked shell model (CSM) calculations. The comparison of the experimental observations with the calculations indicates that this nucleus takes a nonaxial shape similar to other Au nuclei in this region.

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  • Received 14 July 2012

DOI:https://doi.org/10.1103/PhysRevC.86.054305

©2012 American Physical Society

Authors & Affiliations

Y. Oktem1, D. L. Balabanski2, B. Akkus1, L. Amon Susam1, L. Atanasova2, C. W. Beausang3,4, R. B. Cakirli1,5, R. F. Casten3, M. Danchev6,7, M. Djongolov6,7, E. Ganioğlu1, K. A. Gladnishki7, J. Tm. Goon8, D. J. Hartley6,9, A. A. Hecht3,10, R. Krücken3,11, J. R. Novak3, G. Rainovski7, L. L. Riedinger6, T. Venkova2, I. Yigitoglu12, N. V. Zamfir3,13, and O. Zeidan6

  • 1Department of Physics, Istanbul University, Vezneciler, 34134, Istanbul, Turkey
  • 2Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, BG-1784 Sofia, Bulgaria
  • 3Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520, USA
  • 4Department of Physics, University of Richmond, Richmond, Virginia 23173, USA
  • 5Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
  • 6Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
  • 7Faculty of Physics, St. Kliment Ohridski University of Sofia, BG-1164 Sofia, Bulgaria
  • 8Louisiana State University Department of Physics and Astronomy 202 Nicholson Hall, Tower Drive, Baton Rouge, Louisiana 70803-4001, USA
  • 9Department of Physics, U.S. Naval Academy, Annapolis, Maryland 21402, USA
  • 10Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
  • 11TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
  • 12Gaziosmanpaşa University, Science Faculty, Turkey
  • 13National Institute for Physics and Nuclear Engineering, Bucharest-Magurele, Romania

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Issue

Vol. 86, Iss. 5 — November 2012

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