Microscopic Mechanism of Moments of Inertia and Odd-even Differences for Well-Deformed Actinide Nuclei

YU Lei; LIU Shu-Xin; ZENG Jin-Yan

Chinese Physics C> 2004, Vol. 28> Issue(1) : 56-60

Microscopic Mechanism of Moments of Inertia and Odd-even Differences for Well-Deformed Actinide Nuclei

School of Physics,Peking University,Beijing 100871,China2 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000,China3 Department of Physics,Guizhou Normal University,Guiyang 550001,China

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Abstract：
The microscopic mechanism of the variation with rotational frequency of moments of inertia and their odd-even differences for well-deformed actinide nuclei are analyzed by using the particle-number conserving (PNC) method for treating nuclear pairing interaction. The moments of inertia for bands building on high j intruder orbitals in odd-A nuclei, e.g., the ²³⁵U (ν[743]7/2) band, are found to be much larger than those of ground-state bands in neighboring even-even nuclei. Moreover, there exist large odd-even differences in the ω variation of moments of inertia. All these experimental odd-even differences are reproduced quite well in the PNC calculation, in which the effective monopole and quadrupole pairing interaction strengths are determined by the experimental odd-even differences in binding energies and bandhead moments of inertia, and no free parameter is involved in the PNC calculation.

References

[1]

.Bohr A,Mottelson B M.Nuclear Structure Vol.Ⅱ ,New York: Ben..jamin,19752.Firestone F B et al.Table of Isotopes,1996,CD..ROM3.ZENG J Y,LEI Y A,JIN T H et al.Phys.Rev.,1994,C50: 7464.ZENG J Y,LIU S X,LEI Y A et al.Phys.Rev.,2001,C63: 0243055.ZENG J Y,LIU S X,GONG L X et al.Phys.Rev.,2002,C65:0443076.Nilsson S G et al.Nucl.Phys.,1969,A131:17.Bengtsson R,Frauendorf S,May F R At.Data Nucl.Data Tables,1986,35: 158.Rowe D J.Nuclear Collect ive Motion,London: Methuen,1970

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[3]	S.B.Doma . Single Particle Schr dinger Fluid and Moments of Inertia of Deformed Nuclei. Chinese Physics C, 2002, 26(8): 836-842.
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[7]	LIU Zu-Hua . Search for the Hyperdeformed Nuclear States in the Actinide Nuclei. Chinese Physics C, 2000, 24(S1): 29-32.
[8]	FANG XiangZheng , RUAN TuNan . Description of Superdeformed Bands in ¹⁴⁸Gd in q-deformed Moment of Inertia. Chinese Physics C, 2000, 24(3): 269-274.
[9]	Liu Shuxin , Zeng Jinyan . Bandhead Moments of Inertia Systematics and Systematic Spin Assignments of Superdeformed Bands in A≈190 Region. Chinese Physics C, 1999, 23(7): 701-708.
[10]	Zhou Shangui , Zheng Chunkai , Hu Jikmin . Odd-Even Differences in Moments of Inertia of Rare Earth Nuclei from the BCS Theory. Chinese Physics C, 1998, 22(12): 1143-1150.
[11]	Wu Lianao , Ding Huiming . Microscopic Mechanism of Stretching Effect of γ-Soft Nuclei. Chinese Physics C, 1995, 19(11): 1047-1051.
[12]	Shi Zongren , Wan Shuying . Negative Parity States of Collective Motion in Actinide Nuclei. Chinese Physics C, 1995, 19(5): 438-446.
[13]	Di Yaomin . Three-Body Heritage Mixing Interaction and the Variance of Nuclear Moment of Inertia. Chinese Physics C, 1995, 19(6): 554-561.
[14]	Shi Zongren , Wan Shuying . Electric Dipole Moments of Actinide Region. Chinese Physics C, 1995, 19(2): 185-192.
[15]	ZHAO Zheng-Ji , JIN Tai-Hao . Microscopic Mechanism of the Variation of the Ground Band Moments of Inertia with Neutron Numbers in ^166—176Yb. Chinese Physics C, 1992, 16(8): 754-761.
[16]	WANG Zhen.WU Hua-Chuan , . A MICROSCOPIC STUDY OF THE E₄ PROPERTY OF DEFORMED EVEN-EVEN NUCLEI IN THE RARE EARTH REGION. Chinese Physics C, 1990, 14(7): 654-660.
[17]	CHEN Xin-Yi , HU Ji-Min . CALCULATION OF THE EFFECTIVE MOMENT OF INERTIA OF FISSIONING NUCLEI AT SADDLE POINT. Chinese Physics C, 1989, 13(4): 380-383.
[18]	LIU Guo-Xing . EFFECTIVE MOMENT OF INERTIA OF MEDIUM MASS NUCLEI AT THE SADDLE POINT. Chinese Physics C, 1987, 11(1): 98-103.
[19]	WU Chong-Shi , ZENG Jin-Yan . THE COLLECTIVE EXCITATION SPECTRA OF EVEN-EVEM DEFORMED NUCLEI. Chinese Physics C, 1985, 9(2): 214-219.
[20]	WANG ZHENG-DA , ZHENG MAN-JIAO . A SIMPLE METHOD OF CALCULATING MOMENT OF INERTIA AT GROUND STATES OF EVEN-EVEN NUCLEI. Chinese Physics C, 1981, 5(6): 765-768.

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YU Lei, LIU Shu-Xin and ZENG Jin-Yan. Microscopic Mechanism of Moments of Inertia and Odd-even Differences for Well-Deformed Actinide Nuclei[J]. Chinese Physics C, 2004, 28(1): 56-60.

YU Lei, LIU Shu-Xin and ZENG Jin-Yan. Microscopic Mechanism of Moments of Inertia and Odd-even Differences for Well-Deformed Actinide Nuclei[J]. Chinese Physics C, 2004, 28(1): 56-60. shu

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Received: 2003-05-14
Revised: 1900-01-01

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Microscopic Mechanism of Moments of Inertia and Odd-even Differences for Well-Deformed Actinide Nuclei

Corresponding author: ZENG Jin-Yan,

School of Physics,Peking University,Beijing 100871,China2 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000,China3 Department of Physics,Guizhou Normal University,Guiyang 550001,China

Received Date: 2003-05-14
Accepted Date: 1900-01-01
Available Online: 2004-01-05

Abstract: The microscopic mechanism of the variation with rotational frequency of moments of inertia and their odd-even differences for well-deformed actinide nuclei are analyzed by using the particle-number conserving (PNC) method for treating nuclear pairing interaction. The moments of inertia for bands building on high j intruder orbitals in odd-A nuclei, e.g., the ²³⁵U (ν[743]7/2) band, are found to be much larger than those of ground-state bands in neighboring even-even nuclei. Moreover, there exist large odd-even differences in the ω variation of moments of inertia. All these experimental odd-even differences are reproduced quite well in the PNC calculation, in which the effective monopole and quadrupole pairing interaction strengths are determined by the experimental odd-even differences in binding energies and bandhead moments of inertia, and no free parameter is involved in the PNC calculation.