Coexistence of Reflection Asymmetric and Symmetric Shapes in $^{144}\mathrm{Ba}$

Zhu, S. J.; Wang, E. H.; Hamilton, J. H.; Ramayya, A. V.; Liu, Y. X.; Brewer, N. T.; Luo, Y. X.; Rasmussen, J. O.; Xiao, Z. G.; Huang, Y.; Ter-Akopian, G. M.; Oganessian, Ts.

doi:10.1103/PhysRevLett.124.032501

Title: Coexistence of Reflection Asymmetric and Symmetric Shapes in $$^{144}\mathrm{Ba}$$

Journal Article · 23 January 2020 · Physical Review Letters

DOI: https://doi.org/10.1103/PhysRevLett.124.032501 · OSTI ID:1595063

Zhu, S. J. ^[1];

^[2]; Hamilton, J. H. ^[2]; Ramayya, A. V. ^[2]; Liu, Y. X. ^[3]; Brewer, N. T. ^[2];

^[4]; Rasmussen, J. O. ^[5]; Xiao, Z. G. ^[6];

^[6]; Ter-Akopian, G. M. ^[7]; Oganessian, Ts. ^[7]

Tsinghua Univ., Beijing (China); vanderbilt university
Vanderbilt Univ., Nashville, TN (United States)
Huzhou Univ. (China)
Vanderbilt Univ., Nashville, TN (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Tsinghua Univ., Beijing (China)
Joint Inst. for Nuclear Research, Dubna (Russia)

Level structures in the neutron-rich $$^{144}\mathrm{Ba}$$ nucleus have been reinvestigated by measuring prompt gamma rays in the spontaneous fission of $$^{252}\mathrm{Cf}$$. The previous $s = +1$ octupole band structure with reflection asymmetric shape has been expanded, and a side quadrupole band structure based on a $3^+$ state with reflection symmetric shape is identified. Thus, the results show the coexistence of reflection asymmetric and symmetric shapes in $$^{144}\mathrm{Ba}$$. This is a first identification of such a shape coexistence structure in a nuclear structure. Finally, the other structural characteristics are discussed.

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Research Organization:: Vanderbilt Univ., Nashville, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC); USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC03-76SF00098; FG02-88ER40407; FG05-88ER40407

OSTI ID:: 1595063

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 3 Vol. 124; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Coexistence of Reflection Asymmetric and Symmetric Shapes in $$^{144}\mathrm{Ba}$$

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