Evidence for coexisting prolate and near-oblate shapes at high spin in <sup>125</sup>Cs

Ji Sun; Tetsuro Komatsubara; Jia-Qi Wang; Hao Guo; Xue-Yuan Hu; Ying-Jun Ma; Yun-Zuo Liu; Kohei Furuno

doi:10.1088/1674-1137/40/12/124001

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

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Abstract：
Excited states in the odd-proton nucleus ¹²⁵Cs were investigated by means of in-beam γ-ray spectroscopy. The πg_7/2 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 (πg_7/2/d_5/2)⊗(νh_11/2)² configuration and a prolate band built on the πg_7/2⊗(π h_11/2)² configuration, respectively.
- shape coexistence ,
- band crossing ,
- rotational band ,
- high spin state ,
- 125Cs

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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[18]	Xing Zheng , Zeng Wenping , Chen Xingqu , Sun Xiangfu , Liu Zhong . Studies of πh_11/2 Bands in Odd-A^117—125Cs Nuclei. Chinese Physics C, 1996, 20(7): 639-643.
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[20]	Xing Zheng , Wu Xingju . Rotational Effect on Electromagnetic Transitions After Band-Crossing. Chinese Physics C, 1991, 15(S1): 93-100.

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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

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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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通讯作者: 陈斌, [email protected]

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author: Ying-Jun Ma, [email protected]

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 πg_7/2 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 (πg_7/2/d_5/2)⊗(νh_11/2)² configuration and a prolate band built on the πg_7/2⊗(π h_11/2)² configuration, respectively.

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

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

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

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通讯作者: 陈斌, [email protected]

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

Corresponding author: Ying-Jun Ma, [email protected]

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

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