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Chinese Physics C> 2016, Vol. 40> Issue(12) : 124001 DOI: 10.1088/1674-1137/40/12/124001

Evidence for coexisting prolate and near-oblate shapes at high spin in 125Cs

  • 1.

      College of Physics, Jilin University, Changchun 130012, China

  • 2.

      Research Facility Center for Pure and Applied Science, University of Tsukuba, Ibaraki 305-8577, Japan

  • Excited states in the odd-proton nucleus 125Cs were investigated by means of in-beam γ-ray spectroscopy. The πg7/2 band is observed to fork into a ΔI=1 coupled band and a ΔI=2 decoupled band at high spins. To assign the possible configurations of these two bands, experimental B(M1)/B(E2) ratios and signature splittings have been evaluated for the ΔI=1 band, and calculations based on the geometrical model, cranked shell model and total Routhian surfaces model have been performed. They are suggested to be a near-oblate band built on the (πg7/2/d5/2)⊗(νh11/2)2 configuration and a prolate band built on the πg7/2⊗(π h11/2)2 configuration, respectively.
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  • References

    [1] C. M. Parry et al, Phys. Rev. C, 61:021303(2000)
    [2] A. K. Singh et al, Phys. Rev. C, 70:034315(2004)
    [3] A. Al-Khatib et al, Eur. Phys. J. A, 36:21(2008)
    [4] Gong-Ye Liu et al, Chin. Phys. Lett. 29:092301(2012)
    [5] Y. Liang, D. B. Fossan, J. R. Hughes, D. R. LaFosse, T. Lauritsen, R. Ma, E. S. Paul, P. Vaska, M. P. Waring, N. Xu, Phys. Rev. C, 45:1041(1992)
    [6] S-Y Wang et al, J. Phys. G, 32:283(2006)
    [7] I. Ragnarsson, A. Sobiczewski, R. K. Sheline, S. E. Larsson, B. Nerlo-Pomorska, Nucl. Phys. A, 233:329(1974)
    [8] R. Wyss et al, Nucl. Phys. A, 505:337(1989)
    [9] A. Granderath, P. E. Mantica, R. Bengtsson, R. Wyss, P. von Brentano, A. Gelberg, E Seiffert, Nucl. Phys. A, 597:427(1996)
    [10] Q. Yang, H.-L. Wang, Q.-Z. Chai, M.-L. Liu, Chin. Phys. C, 39:094102(2015)
    [11] S. Y. Wang et al, Phys. Rev. C, 81:017301(2010)
    [12] S. Y. Wang et al, Chin. Phys. Lett., 21:1024(2004)
    [13] D. Ward et al, Nucl. Phys. A, 529:315(1991)
    [14] Ji Sun et al, Phys. Rev. C, 93:064301(2016)
    [15] J. R. Hughes, D. B. Fossan, D. R. LaFosse, Y. Liang, P. Vaska, and M. P. Waring, Phys. Rev. C, 44:2390(1991)
    [16] K. Singh et al, Eur. Phys. J. A, 27:321(2006)
    [17] T. Komatsubara et al, Nucl. Phys. A, 557:419c (1993)
    [18] S.-Y. Wang, Y.-Z. Liu, Y.-J. Ma, T. Komatsubra and Y.-H. Zhang, Phys. Rev. C, 75:037302(2007)
    [19] R. Goswami, B. Sethi and P. Banerjee, Phys. Rev. C, 47:1013(1993)
    [20] R. Bengtsson and S. Frauendorf, Nucl. Phys. A, 327:139(1979)
    [21] W. Nazarewicz, J. Dudek, R. Bengtsson, T. Bengtsson and I. Ragnarsson, Nucl. Phys. A, 435:397(1985)
    [22] Ying-Jun Ma et al, J. Phys. G, 26:43(2000)
    [23] S. Raman, C. W. Nestor Jr., and P. Tikkanen, Atomic Data Nucl. Data Tab., 78:1(2001)
    [24] Kuljeet Singh et al, Eur. Phys. J. A, 25:345(2005)
    [25] Y. Liang, R. Ma, E. S. Paul, N. Xu, D. B. Fossan and R. Wyss, Phys. Rev. C, 42:890(1990)
    [26] S. Sihotra et al, Phys. Rev. C, 79:044317(2009)
    [27] Yan-Xin Zhao et al, Chin. Phys. Lett., 26:092301(2009)

  • References

    [1] C. M. Parry et al, Phys. Rev. C, 61:021303(2000)
    [2] A. K. Singh et al, Phys. Rev. C, 70:034315(2004)
    [3] A. Al-Khatib et al, Eur. Phys. J. A, 36:21(2008)
    [4] Gong-Ye Liu et al, Chin. Phys. Lett. 29:092301(2012)
    [5] Y. Liang, D. B. Fossan, J. R. Hughes, D. R. LaFosse, T. Lauritsen, R. Ma, E. S. Paul, P. Vaska, M. P. Waring, N. Xu, Phys. Rev. C, 45:1041(1992)
    [6] S-Y Wang et al, J. Phys. G, 32:283(2006)
    [7] I. Ragnarsson, A. Sobiczewski, R. K. Sheline, S. E. Larsson, B. Nerlo-Pomorska, Nucl. Phys. A, 233:329(1974)
    [8] R. Wyss et al, Nucl. Phys. A, 505:337(1989)
    [9] A. Granderath, P. E. Mantica, R. Bengtsson, R. Wyss, P. von Brentano, A. Gelberg, E Seiffert, Nucl. Phys. A, 597:427(1996)
    [10] Q. Yang, H.-L. Wang, Q.-Z. Chai, M.-L. Liu, Chin. Phys. C, 39:094102(2015)
    [11] S. Y. Wang et al, Phys. Rev. C, 81:017301(2010)
    [12] S. Y. Wang et al, Chin. Phys. Lett., 21:1024(2004)
    [13] D. Ward et al, Nucl. Phys. A, 529:315(1991)
    [14] Ji Sun et al, Phys. Rev. C, 93:064301(2016)
    [15] J. R. Hughes, D. B. Fossan, D. R. LaFosse, Y. Liang, P. Vaska, and M. P. Waring, Phys. Rev. C, 44:2390(1991)
    [16] K. Singh et al, Eur. Phys. J. A, 27:321(2006)
    [17] T. Komatsubara et al, Nucl. Phys. A, 557:419c (1993)
    [18] S.-Y. Wang, Y.-Z. Liu, Y.-J. Ma, T. Komatsubra and Y.-H. Zhang, Phys. Rev. C, 75:037302(2007)
    [19] R. Goswami, B. Sethi and P. Banerjee, Phys. Rev. C, 47:1013(1993)
    [20] R. Bengtsson and S. Frauendorf, Nucl. Phys. A, 327:139(1979)
    [21] W. Nazarewicz, J. Dudek, R. Bengtsson, T. Bengtsson and I. Ragnarsson, Nucl. Phys. A, 435:397(1985)
    [22] Ying-Jun Ma et al, J. Phys. G, 26:43(2000)
    [23] S. Raman, C. W. Nestor Jr., and P. Tikkanen, Atomic Data Nucl. Data Tab., 78:1(2001)
    [24] Kuljeet Singh et al, Eur. Phys. J. A, 25:345(2005)
    [25] Y. Liang, R. Ma, E. S. Paul, N. Xu, D. B. Fossan and R. Wyss, Phys. Rev. C, 42:890(1990)
    [26] S. Sihotra et al, Phys. Rev. C, 79:044317(2009)
    [27] Yan-Xin Zhao et al, Chin. Phys. Lett., 26:092301(2009)

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Ji Sun, Tetsuro Komatsubara, Jia-Qi Wang, Hao Guo, Xue-Yuan Hu, Ying-Jun Ma, Yun-Zuo Liu and Kohei Furuno. Evidence for coexisting prolate and near-oblate shapes at high spin in 125Cs[J]. Chinese Physics C, 2016, 40(12): 124001. doi: 10.1088/1674-1137/40/12/124001
Ji Sun, Tetsuro Komatsubara, Jia-Qi Wang, Hao Guo, Xue-Yuan Hu, Ying-Jun Ma, Yun-Zuo Liu and Kohei Furuno. Evidence for coexisting prolate and near-oblate shapes at high spin in 125Cs[J]. Chinese Physics C, 2016, 40(12): 124001.  doi: 10.1088/1674-1137/40/12/124001 shu
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Received: 2016-08-19
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    Supported in part by National Natural Science Foundation of China (11475072)

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Evidence for coexisting prolate and near-oblate shapes at high spin in 125Cs

    Corresponding author: Ying-Jun Ma, myj@jlu.edu.cn
  • 1.  College of Physics, Jilin University, Changchun 130012, China
  • 2.  Research Facility Center for Pure and Applied Science, University of Tsukuba, Ibaraki 305-8577, Japan
  • Received Date: 2016-08-19
  • Available Online: 2016-12-05
Fund Project:  Supported in part by National Natural Science Foundation of China (11475072)

Abstract: Excited states in the odd-proton nucleus 125Cs were investigated by means of in-beam γ-ray spectroscopy. The πg7/2 band is observed to fork into a ΔI=1 coupled band and a ΔI=2 decoupled band at high spins. To assign the possible configurations of these two bands, experimental B(M1)/B(E2) ratios and signature splittings have been evaluated for the ΔI=1 band, and calculations based on the geometrical model, cranked shell model and total Routhian surfaces model have been performed. They are suggested to be a near-oblate band built on the (πg7/2/d5/2)⊗(νh11/2)2 configuration and a prolate band built on the πg7/2⊗(π h11/2)2 configuration, respectively.

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