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简述了若干转动谱理论及其对超形变带的应用,并用Bohr-Mottelson的I(I+1)展开公式分析了A=190区超形变带的性质和指定了它们的能级自旋,用Harris的ω2展开公式J(1)=2α+(4/3)βω2+(6/5)γω4分析了A=150区Tb和Dy同位素20条超形变带的性质,指定了它们的能级自旋.对于首次发现的152Dy(1)超形变带,带首自旋指定为26 , 与实验结果更加符合.

The recent developments of rotational spectral theories and its application to superdeformed bands were briefly reviewed. The superdeformed bands in A≈190 region were analyzed and the spins of energy level were determined by the least-square fitting experimental transition energy with the formula of Bohr-Mottelson’s I(I+1) expansions. The superdeformed bands in A≈150 region were analyzed by using the kinematic moments of inertia formula J(1)=2α+(4/3)βω2+(6/5)γω4 in order to extract level spin. The results show that the calculated J(1) of 20 superdeformed bands in Tb and Dy isotopes are agreement excellently with that of extracted from expression 2(2I-1)/Eγ(I). In particular, the spin of the lowest level of the first discovered high-spin SD band 152Dy(1) predicted to be I0=26 is more proper.

参考文献

[1] Bohr A. The Coupling of Nuclear Surface Oscillations to the Motion of Individual Nucleons[J]. Dan Mat Fys Medd, 1952, 26(14): 1-40.
[2] Bohr A, Mottelson B R. Collective and Individual-particle Aspects of Nuclear Structure[J]. Dan Mat Fys Medd, 1953, 27(16): 1-174.
[3] Bohr A, Mottelson B R. Nuclear Structure: II nuclear deformation [M]. Benjamin W A, ed. Inc, New York, 1975.
[4] 曾谨言, 孙洪洲. 原子核结构理论[M]. 上海:上海科学技术出版社, 1987, 178-181.
[5] Wu Chongshi, Zeng Jinyan. New Expressions for the Collective Excitation Spectra in Even-even Nuclei[J]. Commun in Theor Phys (China), 1985, 8: 51-74.
[6] Raychev P P, Roussev R P, Smirnov Y F. The Quantum Algebra SUq(2) and Rotational Spectra of Deformed Nuclei[J]. J Phys, 1990, G16: L137-L141.
[7] Bonatsos D, Argyres E N, Drenska S B, et al. SUq(2) Description of Rotational Spectra and its Relation to the Variable Motion of the Inertia Model[J]. Phys Lett, 1990, 251: 477-482.
[8] 张新明, 周焕强. 偶偶核基带的量子群Uqp(u2)模型的理论分析[J]. 高能物理与核物理, 1996, 20: 165-174.
[9] 张新明, 周焕强, 贺劲松. “全同”超形变核转动带的量子群Uqp(u2)模型的理论分析[J]. 高能物理与核物理, 1998, 22:803-811.
[10] Liu Y X, Song J G, Sun H Z, et al. Description of Superdeformed Nuclear States in the Interacting Boson Model[J]. Phys Rev, 1997, C56: 1 370-1 379.
[11] Liu Y X. Superdeformed Identical Bands 152Dy(1) and 151Tb(2) in Supersymmetry with a Many-body Interaction[J]. Phys Rev, 1998, C58: 900-904.
[12] Liu Y X, Sun D, Zhao E G. Systematic Description of the Superdeformed Bands of the Odd-A Nuclei in the A=150 Region[J]. Phys Rev, 1999, C59: 2 511-2 519.
[13] 方向正. 转动惯量的q-公式[D], 合肥:中国科学技术大学, 1999.
[14] 郭建友, 徐辅新. 锕系和稀土区偶-偶核形变参数分析[J]. 宁夏大学学报(自然科学版), 1998, 4: 317-318; 郭建友, 徐辅新, 阮图南. 190区超形变核态的形变参数分析[J]. 中国科技大学学报, 1999, 1: 66-70.
[15] Guo Jian You, Xu Fu Xin, Ruan Tu Nan. Description of Staggering Phenomenon of the Superdeformed Bands in SUq(2) Symmetry[J]. High Energy Physics and Nuclear Physics, 2000, 24: 181-184.
[16] Zeng J Y, Meng J, Wu C S, et al. Spin Determination and Quantized Aignment in the Superdeformed Bands in 152Dy, 151Tb and 150Gd[J]. Phys Rev, 1991, C44: R1 745-R1 748; Wu C S, Zeng J Y, Xing Z, et al. Spin Determination and Calculation of Nuclear Superdeformed Bands in A≈190 Region[J]. Phys Rev, 1992, C45: 261-274.
[17] Xu F R, Hu J M. Cranking Bohr-Mottelson Hamiltonian Applied to Superdeformed Bands in the A≈150 Region[J]. Phys Rev, 1995, C52: 431-434.
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