Triaxial deformation and nuclear shape transition in 192Au

Oktem, Y.; Balabanski, D.L.; Akkus, B.; Susam, L. Amon; Atanasova, L.; Beausang, C. W.; Cakirli, R. Burcu; Casten, R.F.; Danchev, M.; Djongolov, M.; Ganioğlu, E.; Gladnishki, K.A.; Goon, J.Tm.; Hartley, D.J.; Hecht, A.A.; Krücken, R.; Novak, J.R.; Rainovski, G.; Riedinger, L.L.; Venkova, T.; Yigitoglu, I.; Zamfir, N.V.; Zeidan, O.

doi:10.1103/PhysRevC.86.054305

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Triaxial deformation and nuclear shape transition in ¹⁹²Au

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Cakirli, R. Burcu
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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http://link.aps.org/doi/10.1103/PhysRevC.86.054305
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Citation

Oktem, Y., Balabanski, D., Akkus, B., Susam, L. A., Atanasova, L., Beausang, C. W., et al. (2012). Triaxial deformation and nuclear shape transition in ¹⁹²Au. Physical Review C, 86(05): 054305, pp. 1-8. doi:10.1103/PhysRevC.86.054305.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0010-201B-B

Abstract

Background: Nuclei in the A≈190 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 A≈190 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 I^π=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.