Re-discussion of the Spin Assignments of the Superdeformed Bands in A≈190 Region (Ⅲ) Doubly Odd Superdeformed Nuclei

Wu Chongshi; Zhou Zhining

Chinese Physics C> 1999, Vol. 23> Issue(12) : 1209-1215

Re-discussion of the Spin Assignments of the Superdeformed Bands in A≈190 Region (Ⅲ) Doubly Odd Superdeformed Nuclei

Wu Chongshi ^, ,
Zhou Zhining

Confer of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 7300002 Department of Physics,Peking University,Beijing 100871

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Abstract：
The influence of the fluctuation in γ-transition energies and the I=1 staggering on the spin assignment of superdeformed band is inveshgated for the doubly odd nuclei in mass A≈190 region. The extracted fluctuations in γ-transition energies are not too large, implying a weak innuence on their spin assignments except for the fitting parameters and precisions. In addition, the I= staggering in superdeformed signature partner pairs of doubly odd nuclei behaves differently from that in odd-A nuclei and can be understood in the framework of the collechve model.The existence of I=1 staggering also exefts no influence on the spin assignment except for a renormalizahon of fithng parameters. A modified ab-expresion valid in doubly odd nuclei is proPOsed. The smoothed ti'ansihon energies are employed to assign the spins of these superdeformed bands by the ab-fitting and itS modification.

References

[1]

Wu Chongshi. High Energy Phys. and Nucl. Phys. (in Chinese), 1998, 22:48–54(吴崇试.高能物理与核物理, 1998, 22: 48–54)2 Wu Chongshi. gogh Energy Phys. and Nucl. Phys. (in Chinese), 1998, 22:71–77(吴崇试.高能物理与核物理, 1998, 22 71–77)3 Wu Chongshi. High Energy Phys. and Nucl. Phys. (in Chinese), 1997, 21.621–626(吴崇试.高能物理与核物理,1997,21621–626)4 Wu C S, Zhou Z N. Phys. Rev., 1997, C56:1814~18205 Wu Chongshi, Li Zhonghua. High Energy Phys. and Nucl. Phys. (in Chinese), 1999, 23(8):797(吴崇试,李中华高能物理与核物理,1999,23(8)797) 6 Azaiez F, Keily W H. Korten W et al. Phys. Rev. Lett., 1991, 66. 1030–10337 Fischer S M Carpenter M P, Janssens R V F et al. Phys. Rev., 1996, C53:2126–21338 Liang Y, Capenter M P, Janssens R V F et al. Phys. Rev., 1992, C46.R2136–21399 Clark R M, Bouneau S, Azaiez F et al. Phys. Rev., 1995, C51: R1052–1055 10 Clark R M, Bouneau S, Wilson S et al. Phys. Rev., 1996, C53: 117–12311 Bohr A, Mottelson B K Nuclear Structure, Vol. II, Nuclear Deformahons. New York: Benjamin, 1973. 33 12 Wu C S, Cheng L, Lin C Z et al. Phys. kiev., 1992, C45:2507–2510 13 Han X–L, Wu C L. At. Data Nucl. Data Tables, 1996, 63:117–186

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[15]	Zhou Shangui , Xu Furong , Zheng Chunkai , Hu Jimin . Alignment Additivity of Superdeformed Bands of Odd-Odd Nuclei in A=190 Region. Chinese Physics C, 1999, 23(8): 803-806.
[16]	Wu Chongshi , Li Zhonghua . Re-discussion of the Spin Assignments of the Superdeformed Bands in A≈190 Region (Ⅱ) Odd Superdeformed Nuclei. Chinese Physics C, 1999, 23(8): 797-802.
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[19]	Xu Furong , Hu Jimin , Zheng Chunkai . The Vibrational and Rotational Motions Model of Nucleus(Ⅲ) Study of Superdeformed Bands in A～190 Region. Chinese Physics C, 1996, 20(6): 554-562.
[20]	CHEN Xing-Qu , XING Zheng . Phenomenological Analysis and Determination of Spins for Superdeformed Bands in the Mass-190 Region. Chinese Physics C, 1991, 15(12): 1094-1100.

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Wu Chongshi and Zhou Zhining. Re-discussion of the Spin Assignments of the Superdeformed Bands in A≈190 Region (Ⅲ) Doubly Odd Superdeformed Nuclei[J]. Chinese Physics C, 1999, 23(12): 1209-1215.

Wu Chongshi and Zhou Zhining. Re-discussion of the Spin Assignments of the Superdeformed Bands in A≈190 Region (Ⅲ) Doubly Odd Superdeformed Nuclei[J]. Chinese Physics C, 1999, 23(12): 1209-1215. shu

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Received: 1998-10-15
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

Re-discussion of the Spin Assignments of the Superdeformed Bands in A≈190 Region (Ⅲ) Doubly Odd Superdeformed Nuclei

Corresponding author: Wu Chongshi,

Confer of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 7300002 Department of Physics,Peking University,Beijing 100871

Received Date: 1998-10-15

Accepted Date: 1900-01-01

Available Online: 1999-12-05

Abstract: The influence of the fluctuation in γ-transition energies and the I=1 staggering on the spin assignment of superdeformed band is inveshgated for the doubly odd nuclei in mass A≈190 region. The extracted fluctuations in γ-transition energies are not too large, implying a weak innuence on their spin assignments except for the fitting parameters and precisions. In addition, the I= staggering in superdeformed signature partner pairs of doubly odd nuclei behaves differently from that in odd-A nuclei and can be understood in the framework of the collechve model.The existence of I=1 staggering also exefts no influence on the spin assignment except for a renormalizahon of fithng parameters. A modified ab-expresion valid in doubly odd nuclei is proPOsed. The smoothed ti'ansihon energies are employed to assign the spins of these superdeformed bands by the ab-fitting and itS modification.

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Re-discussion of the Spin Assignments of the Superdeformed Bands in A≈190 Region (Ⅲ) Doubly Odd Superdeformed Nuclei

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