Collective Dand Structures in Doubly Odd <SUP>136</SUP>La Nucleus

ZHU Sheng-Jiang; XIAO Shu-Dong; CHE Xing-Lai; YU Ying-Nan; LI Ming-Liang; CHEN Yong-Jing; ZHU Li-Hua; WEN Shu-Xian; WU Xiao-Guang; LI Guang-Sheng

Chinese Physics C> 2005, Vol. 29> Issue(11) : 1047-1051

Collective Dand Structures in Doubly Odd ¹³⁶La Nucleus

Department of Physics, Tsinghua University, Beijing 100084, China2 China Institute of Atomic Energy, Beijing 102413, China

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Abstract：
Using heavy-ion nuclear reaction and in-beam γ-ray spectroscopy technique,high spin states of ¹³⁶La have been studied. The nuclear reaction used is ¹³⁰Te(¹¹B,5n) with a beam energy 60MeV. The level scheme with three collective band structures has been updated with spin up to 20h. The collective backbending has been observed in $\uppi h_{11/2}\otimes \upnu h_{11/2}$ band. According to the TRS calculations，this backbending is due to the alignment of a pair of h_11/2 neutrons. The signature splitting and inversion for the $\uppi h_{11/2}\otimes \upnu h_{11/2}$ band were also discussed. Other two bands based on $12^-$ and $16^+$ levels were proposed as oblate deformation with $\gamma\approx -60^\circ$. They most probably originate from four- and six- quasiparticle configurations, that is,$\uppi h_{11/2}\otimes\upnu g_{7/2} h_{11/2}^2$ and $\uppi g_{7/2}\otimes\upnu g_{7/2}^2 d_{5/2}h_{11/2}^2$ respectively.

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[1]

. Paul E S, Beausang C W, Fossan D B et al. Phys. Rev.Lett., 1987, 58: 9842. Paul E S, Fossan D B, Liang Y et al. Phys. Rev., 1989,C40: 12553. ZHU Sheng-Jiang, GAN Cui-Yun, ZHU Ling-Yan et al.High Energy Phys. and Nucl. Phys., 2005, 29: 130(in Chinese)(朱胜江，廿翠云，朱凌燕等.高能物理与核物理，2005. 29:130)4. Bark R A, Baxter A M, Byrne A P et al. Nucl. Phys., 2001,A691: 5775. LUO Peng, ZHANG Yu-Hu, ZHOU Xiao-Hong et al. HighEnergy Phys. and Nucl. Phys., 2004, 28: 495(in Chinese)(骆鹏，张玉虎，周小红等.高能物理与核物理，2004, 28: 495)6. ZHU S J, ZHU L Y, LI M et al. Phys. Rev., 2000, C62:0443107. ZHU S J, LI M, ZHU L Y et al. Chin. Phys. Lett., 1999,16: 6358. Morek T, Beuscher H, Bochev B et al. Nucl. Phys., 1985,A433: 1599. Cybulska E W, Oliveira J R B, Rizzutto M A et al. ActaPhys. Polonica, 2001, B32: 92910. Radford D C. Nucl. Instrum. Methods, 1995, A361: 29711. Kumar V, Das P, Singh R P et al. Eur. Phys. J., 2003,A17: 15312. LIU Y, LU J B, MA Y J et al. Phys. Rev., 1996, C54: 71913. Bengtsson R et al. Nucl. Phys., 1972, A237: 13914. Frauendorf S et al. Phys. Lett., 1981, B100: 21915. Frauendorf S et al. Phys. Lett., 1983, B125: 21916. Hauschild K, Wadsworth R, Clark R M et al. Phys. Rev.,1996, C54: 613

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[5]	WANG Hua-Lei , ZHANG Yu-Hu , ZHOU Xiao-Hong , GUO Ying-Xiang , LEI Xiang-Guo , LIU Min-Liang , TUO Peng , XIE Cheng-Ying , SONG Li-Tao , YU Hai-Ping , ZHENG Yong , GUO Wen-Tao , , , , . Observation of πh_11/2⊙νi_13/2 Band in Doubly-Odd ¹⁷⁰Re and Its Systematic Analysis. Chinese Physics C, 2004, 28(S1): 47-49.
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[8]	ZHANG Yu-Hu , ZHOU Xiao-Hong , HE Jian-Jun , LIU Zhong , GAN Zai-Guo , , , , , , , , , , . Study of Signature Inversion in the πi_13/2νi_13/2Bands of Odd Odd Nuclei. Chinese Physics C, 2003, 27(4): 313-318.
[9]	ZHANG Yu-Hu , ZHOU Xiao-Hong . Experimental Study of High-Spin Band Structures in Odd-Odd ¹⁷²Re. Chinese Physics C, 2003, 27(7): 574-580.
[10]	GAN Zai-Guo , LIU Zhong , ZHANG Yu-Hu , PAN Qiang-Yan . A New Isomer State in ¹³⁶Ba. Chinese Physics C, 2002, 26(8): 814-817.
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[12]	DONG Bao-Guo , GUO Hong-Chao , Ingemar Ragnarsson . Shape Coexistence and Band Termination in ¹³¹La. Chinese Physics C, 2002, 26(3): 266-272.
[13]	ZHAO Guang-Yi , LU Jing-Bin , MA Ying-Jun , YIN Li-Chang , LI Xian-Feng , LI Zhi-Huan , WANG Zhi-Kui , WU Xiao-Guang , LI Guang-Sheng , WEN Shu-Xian , YANG Chun-Xiang , LIU Yun-Zuo . Systematic Features of π1/2^－[541]⊙νi_13/2 Bands in Doubly-Odd Nuclei. Chinese Physics C, 2000, 24(S1): 33-37.
[14]	ZHANG YuHu . Signature Inversion in the Rotational Bands of Odd-Odd ¹⁷⁸Ir. Chinese Physics C, 2000, 24(12): 1123-1130.
[15]	ZHU ShengJiang , WANG MuGe , ZHU LingYan , LI Ming , GAN CuiYun , YANG LiMing , M Sakhaee , Pau Sanli , DENG JingKang , LONG GuiLu . Octupole Deformation in Neutron Rich ^145,147 La Nuclei. Chinese Physics C, 2000, 24(5): 418-425.
[16]	ZHU ShengJiang , GAN CuiYun , ZHU LingYan , YANG LiMing , XU RuiQing , JON MyonGil , JIANG Zhuo , ZHANG Zheng , . Collective Band Structures in Neutron-Rich Odd-A ^145,147Ce Nuclei. Chinese Physics C, 2000, 24(11): 1018-1023.
[17]	Zhang Yuhu , Zhao Qingzhong , Zhou Xiaohong Xu Hushan , Guo Yingxiang , Lei Xiangguo , Lu Jun , Zhu Shaofei , Gou Quanbu , Jin Hanjuan , Liu Zhong , Luo Yixiao , Sun Xiangfu , Zhu Yongtai , . Band Structure in Doubly Odd ¹⁷⁰Ta. Chinese Physics C, 1997, 21(2): 187-191.
[18]	Wu Chongshi . Bandcrossing of K=1/2 Bands in Odd - Proton Nuclei. Chinese Physics C, 1995, 19(11): 1024-1028.
[19]	Xing Zheng , Chen Xingqu . Analysis of Identical Bands for Odd-A Superdeformed Nuclei in A～190 Mass Region. Chinese Physics C, 1995, 19(4): 354-358.
[20]	R.L.Robinson , A.V.Ramayya . DISCOVERY OF MULTIPLE,COLLECTIVE BAND STRUCTURES IN NUCLEI WITH A=60—80. Chinese Physics C, 1979, 3(3): 355-381.

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ZHU Sheng-Jiang, XIAO Shu-Dong, CHE Xing-Lai, YU Ying-Nan, LI Ming-Liang, CHEN Yong-Jing, ZHU Li-Hua, WEN Shu-Xian, WU Xiao-Guang and LI Guang-Sheng. Collective Dand Structures in Doubly Odd ¹³⁶La Nucleus[J]. Chinese Physics C, 2005, 29(11): 1047-1051.

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Received: 2005-02-02
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Collective Dand Structures in Doubly Odd ¹³⁶La Nucleus

Corresponding author: ZHU Sheng-Jiang,

Department of Physics, Tsinghua University, Beijing 100084, China2 China Institute of Atomic Energy, Beijing 102413, China

Received Date: 2005-02-02

Accepted Date: 1900-01-01

Available Online: 2005-11-05

Abstract: Using heavy-ion nuclear reaction and in-beam γ-ray spectroscopy technique,high spin states of ¹³⁶La have been studied. The nuclear reaction used is ¹³⁰Te(¹¹B,5n) with a beam energy 60MeV. The level scheme with three collective band structures has been updated with spin up to 20h. The collective backbending has been observed in $\uppi h_{11/2}\otimes \upnu h_{11/2}$ band. According to the TRS calculations，this backbending is due to the alignment of a pair of h_11/2 neutrons. The signature splitting and inversion for the $\uppi h_{11/2}\otimes \upnu h_{11/2}$ band were also discussed. Other two bands based on $12^-$ and $16^+$ levels were proposed as oblate deformation with $\gamma\approx -60^\circ$. They most probably originate from four- and six- quasiparticle configurations, that is,$\uppi h_{11/2}\otimes\upnu g_{7/2} h_{11/2}^2$ and $\uppi g_{7/2}\otimes\upnu g_{7/2}^2 d_{5/2}h_{11/2}^2$ respectively.

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Collective Dand Structures in Doubly Odd ¹³⁶La Nucleus