Octupole Deformation in Even-Even Rn-Th Nuclei

WU Zhe-Ying; XU Fu-Rong

Chinese Physics C> 2006, Vol. 30> Issue(S2) : 78-80

Octupole Deformation in Even-Even Rn-Th Nuclei

WU Zhe-Ying ^, ,
XU Fu-Rong

MOE Key Laboratory, School of Physics, Peking University, Beijing 100871, China2 Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, China3 Center for Theoretical Nuclear Physics, National Laboratory for Heavy Ion Physics, Lanzhou 730000, China

Abstract
HTML
Reference
Related

PDF

Abstract：
The ground-state properties and high-spin spectra of the light even-even Rn-Th nuclei have been systematically investigated using the cranking shell model in a multidimentional deformation space, including β₂, β₃, β₄ and β₅ degrees of freedom. Calculations reproduce well the experimental values of the moment of inertia. The investigation of the structures shows that, with increasing neutron number, the ground-state shapes of these nuclei evolve from nearly spherical(N≈130), through well-developed octupole (N≈136) to well-deformed quadrupole (N≥140) shapes. Cranking calculations display that the nuclei investigated are very octupole soft and will restore to reflection-symmetric shapes at high spin.

References

[1]

. Asaro F, Stephens F S, Perlman I. Phys. Rev., 1953, 92:14952. Stephens F S, Asaro F, Perlman I. Phys. Rev., 1954, 96:1568; 1955, 100: 15433. Ahmad I, Bulter P A. Ann. Rev. Nucl. Part. Sci., 1993, 43:3214. Butler P A, Nazarewicz W. Rev. Mod. Phys., 1996, 68:3495. Cocks J F C, Hawcroft D, Amzal N et al. Nucl. Phys., 1999,A645: 616. CHEN Y S, GAO Z C. Phys. Rev., 2000, C63: 0143147. Myers W D, Swiatecki W J. Ann. Phys., 1969, 84: 3958. Dudek J, Szymanski Z, Werner T. Phys. Rev., 1981, C23:9209. Pradhan H C, Nogami Y, Law J. Nucl. Phys., 1973, A201:35710. Mller P, Nix R. Nucl. Phys., 1992, A536: 2011. Sakamoto H, Kishimoto T. Phys. Lett., 1990 B245:32112. Rozmej P, cwiok S, Sobiczewski A. Phys. Lett., 1988 B203: 19713. Sobiczewski A, Patyk Z, cwiok S et al. Nucl. Phys., 1988 A485: 1614. Satu胠a W, Wyss R, Magierski P. Nucl. Phys., 1994, A578:45

[1]	DING Bin-Gang , LU Ding-Hui . Systematid study on the Even-Even nuclei and odd-A nuclei calculating error with Relativistic Mean-Field Theory. Chinese Physics C, 2006, 30(1): 38-43.
[2]	CHEN Yong-Jing , ZHU Sheng-Jiang , CHE Xin-Lai , DING Huai-Bo , LI Ming-Liang . Octupole Deformed Band and Quasi-γ Band in ¹⁴⁶Ce Nucleus. Chinese Physics C, 2006, 30(8): 740-744.
[3]	XU Yan-Bing . Influence of 1h_11/2 Orbit on the Shapes of Even Even Nuclei Around A～100 Region. Chinese Physics C, 2004, 28(6): 601-606.
[4]	LUO Wan-Ju , GUO Ying-Xiang , ZHOU Xiao-Hong , ZHANG Yu-Hu , LEI Xiang-Guo , LIU Zhong , HE Jian-Jun , ZHENG Yong , LIU Min-Liang , ZHU Li-Hua , WEN Shu-Xian . Experimental Study of Level Structure in ²⁰⁷Rn. Chinese Physics C, 2003, 27(5): 402-405.
[5]	XU Yan-Bing , LIAO Ji-Zhi . Studies on the HF States and the Negative-Parity Spectra of Even Even Cd Nuclei. Chinese Physics C, 2003, 27(2): 142-146.
[6]	XU Yan-Bing , LIAO Ji-Zhi . Studies on the HF States and the Negative Parity Bands of Even Even Ge and Se Nuclei. Chinese Physics C, 2002, 26(6): 613-619.
[7]	GUO JianYou , RUAN TuNan , XU FuXin . Collective Motion of a pure Octupole Deformed System. Chinese Physics C, 2000, 24(12): 1194-1198.
[8]	Xu Yanbing , Liu Yingtai , Liao Jizhi . Systematic Research on Shapes of Even Even Nuclei Around A～100 Regions With DHF Method. Chinese Physics C, 1999, 23(6): 561-566.
[9]	Wu Chongshi . Re-Discussion of the Spin Assignments of the Superdeformed Bands in A～190 Region (I) Even-Even Superdeformed Nuclei. Chinese Physics C, 1998, 22(1): 71-77.
[10]	Wang Baolin . Calculation of Ground State Deformation of Even-Even Rare-Earth Nuclei in sdg Interacting Bosou Model. Chinese Physics C, 1995, 19(8): 764-768.
[11]	Sang Jianping , Liu Yong . Microscopic investigation of High-Spin States for Even-Even Nuclei(Ⅰ) Approach. Chinese Physics C, 1994, 18(10): 936-942.
[12]	Qian Chengde . Effects of Positive-Parity States Octupole Correlations for Even-Even Nuclei in Rotational Regions. Chinese Physics C, 1994, 18(5): 473-480.
[13]	XING Zheng , CHEN Xing-Qu . Phenomenological Analysis of Superdeformed Bands in Even-Even Nuclei. Chinese Physics C, 1991, 15(11): 1020-1024.
[14]	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.
[15]	ZHANG Jing-Ye , ZHONG Ji-Quan , LIAO Bi-Cheng . ON THE EDFORMATION OF THE EVEN-EVEN RARE-EARTH NUCLEI. Chinese Physics C, 1988, 12(5): 665-668.
[16]	LIAO Ji-Zhi , PU Xian-An . A NEW EXPRESSION FOR THE ROTATIONAL BANDS OF AN EVEN-EVEN NUCLEUS. Chinese Physics C, 1984, 8(4): 486-490.
[17]	WU CHONG-SHI , ZENG JIN-YIAN . TWO-NUCLEON TRANSFER REACTIONS ON DEFORMED NUCLEI. Chinese Physics C, 1981, 5(4): 493-502.
[18]	Liao Ji-zhi . THREE BAND INTERSECTION MODEL DESCRIBING THE HIGH SPIN STATES OF EVEN-EVEN NUCLEI. Chinese Physics C, 1980, 4(5): 626-631.
[19]	Gu Jin-nan , Wang Zheng-da . THE ROTATIONAL THREE-BAND INTERACTION FOR EVEN-EVEN NUCLEI. Chinese Physics C, 1980, 4(5): 652-660.
[20]	CHANG JING-YE . ON THE MECHANISM OF BACKBENDING PHENOMENA OF SOME EVEN-EVEN NUCLEI II. Chinese Physics C, 1978, 2(6): 558-561.

Access

Get Citation

WU Zhe-Ying and XU Fu-Rong. Octupole Deformation in Even-Even Rn-Th Nuclei[J]. Chinese Physics C, 2006, 30(S2): 78-80.

WU Zhe-Ying and XU Fu-Rong. Octupole Deformation in Even-Even Rn-Th Nuclei[J]. Chinese Physics C, 2006, 30(S2): 78-80. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2006-10-13
Revised: 1900-01-01

Article Metric

Article Views(4454)
PDF Downloads(705)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Octupole Deformation in Even-Even Rn-Th Nuclei

WU Zhe-Ying ^,
XU Fu-Rong

Corresponding author: WU Zhe-Ying,

MOE Key Laboratory, School of Physics, Peking University, Beijing 100871, China2 Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, China3 Center for Theoretical Nuclear Physics, National Laboratory for Heavy Ion Physics, Lanzhou 730000, China

Received Date: 2006-10-13
Accepted Date: 1900-01-01
Available Online: 2006-01-03

Abstract: The ground-state properties and high-spin spectra of the light even-even Rn-Th nuclei have been systematically investigated using the cranking shell model in a multidimentional deformation space, including β₂, β₃, β₄ and β₅ degrees of freedom. Calculations reproduce well the experimental values of the moment of inertia. The investigation of the structures shows that, with increasing neutron number, the ground-state shapes of these nuclei evolve from nearly spherical(N≈130), through well-developed octupole (N≈136) to well-deformed quadrupole (N≥140) shapes. Cranking calculations display that the nuclei investigated are very octupole soft and will restore to reflection-symmetric shapes at high spin.