Total Routhian surface calculations of triaxial or γ-soft propertiesin even-A N=76 isotones with 54≤Z≤68

YANG Qiong; WANG Hua-Lei; CHAI Qing-Zhen; LIU Min-Liang

doi:10.1088/1674-1137/39/9/094102

近期发现有不法分子冒充我刊与作者联系，借此进行欺诈等不法行为，请广大作者加以鉴别，如遇诈骗行为，请第一时间与我刊编辑部联系确认（《中国物理C》（英文）编辑部电话：010-88235947,010-88236950），并作报警处理。

本刊再次郑重声明：

（1）本刊官方网址为cpc.ihep.ac.cn和https://iopscience.iop.org/journal/1674-1137

（2）本刊采编系统作者中心是投稿的唯一路径，该系统为ScholarOne远程稿件采编系统，仅在本刊投稿网网址（https://mc03.manuscriptcentral.com/cpc）设有登录入口。本刊不接受其他方式的投稿，如打印稿投稿、E-mail信箱投稿等，若以此种方式接收投稿均为假冒。

（3）所有投稿均需经过严格的同行评议、编辑加工后方可发表，本刊不存在所谓的“编辑部内部征稿”。如果有人以“编辑部内部人员”名义帮助作者发稿，并收取发表费用，均为假冒。

《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 2015, Vol. 39> Issue(9) : 094102 DOI: 10.1088/1674-1137/39/9/094102

Total Routhian surface calculations of triaxial or γ-soft propertiesin even-A N=76 isotones with 54≤Z≤68

Abstract
HTML
Reference
Related

PDF

Abstract：
Total Routhian surface (TRS) calculations for even-even N=76 isotones with 54≤Z≤68 have been performed in three-dimensional (β₂, γ, β₄) deformation space. Calculated results of the equilibrium deformations are presented and compared with other theoretical predictions and available experimental data. The behavior of collective angular momentum shows the neutron rotation-alignment is preferred in the lighter N=76 isotones, while for the heavier ones the proton alignment is favored. Moreover, multi-pair nucleon alignments and their competition (e.g., in ¹⁴⁴Er) are predicted. It is pointed out that these nuclei in the N=76 isotonic chain exhibit triaxiality or γ softness in high-spin states as well as ground states. Based on deformation-energy curves with respect to axial and non-axial quadrupole deformations, the shape instabilities are evaluated in detail and predicted, particularly in γ direction. Such instabilities are also supported by the odd- and even-spin level staggering of the observed γ bands, which is usually used to distinguish between γ-rigid and γ-soft asymmetry.

[1]	null . Scale-invariance in soft gamma repeaters. Chinese Physics C, 2017, 41(6): 065104. doi: 10.1088/1674-1137/41/6/065104
[2]	Rui-Ju Guo , Zhi-Quan Li , Chen Liu , Yong-He Tian , Shou-Yu Wang . Shell-model calculations for the semi-magic nucleus ⁸⁵Br and systematic features of the N=50 odd-A isotones. Chinese Physics C, 2017, 41(8): 084105. doi: 10.1088/1674-1137/41/8/084105
[3]	Qiu-Yue Li , Xiao-Xiang Wang , Yan Zuo , Yu Zhang , Feng Pan . Triaxial dynamics in the quadrupole-deformed rotor. Chinese Physics C, 2016, 40(1): 014101. doi: 10.1088/1674-1137/40/1/014101
[4]	SHI Wen-Xian , CHEN Qi-Bo . Wobbling geometry in a simple triaxial rotor. Chinese Physics C, 2015, 39(5): 054105. doi: 10.1088/1674-1137/39/5/054105
[5]	HUANG Xiao-Long , JIANG Li-Yang , CHEN Xiong-Jun , CHEN Guo-Chang . Evaluation of the 1077 keV γ-ray emission probability from ⁶⁸Ga decay. Chinese Physics C, 2014, 38(4): 044001. doi: 10.1088/1674-1137/38/4/044001
[6]	WANG Hua-Lei , CHAI Qing-Zhen , JIANG Jin-Ge , LIU Min-Liang . Rotational properties in even-even superheavy ^254-258Rf nuclei based on total-Routhian-surface calculations. Chinese Physics C, 2014, 38(7): 074101. doi: 10.1088/1674-1137/38/7/074101
[7]	YANG Lin-Meng , GUO Wen-Jun , ZHANG Fan , NI Sheng . Study of the total reaction cross section via QMD. Chinese Physics C, 2013, 37(10): 104101. doi: 10.1088/1674-1137/37/10/104101
[8]	HAN Rui , JI Juan-Xia , LI Jia-Xing . A relativistic continuum Hartree-Bogoliubov theory description of N=3 isotones. Chinese Physics C, 2011, 35(9): 821-824. doi: 10.1088/1674-1137/35/9/006
[9]	ZHAO Ting , GAO Bin , LIU Lei , YE Qing , CHU Wang-Sheng , WU Zi-Yu . Theoretical XANES spectra for C₇₆ isomers. Chinese Physics C, 2009, 33(11): 954-959. doi: 10.1088/1674-1137/33/11/005
[10]	SUN Qin , GUO Jian-You . Neutron halos in the excited states for N=127 isotones. Chinese Physics C, 2009, 33(S1): 130-133. doi: 10.1088/1674-1137/33/S1/041
[11]	BAI Hong-Bo , DONG Hong-Fei , ZHANG Jin-Fu , LÜ Li-Jun , CAO Wan-Cang , LI Xiao-Wei , WANg Yin . Isospin structure in ⁶⁸Ge. Chinese Physics C, 2009, 33(S1): 40-42. doi: 10.1088/1674-1137/33/S1/013
[12]	CHEN Yong-Shou , GAO Zao-Chun . Triaxial rotation in atomic nuclei. Chinese Physics C, 2009, 33(S1): 1-4. doi: 10.1088/1674-1137/33/S1/001
[13]	GUO Yan-Qing , REN Zhong-Zhou , CHEN Yu-Qing . Structures of N=7 and N=8 isotones with l² coupling. Chinese Physics C, 2008, 32(S2): 44-47.
[14]	LIU Ying , WU Xiao-Guang , ZHU Li-Hua , LI Guang-Sheng , HE Chuang-Ye , LI Xue-Qin , PAN Bo , HAO Xin , LI Li-Hua , WANG Zhi-Min , LI Zhong-Yu , XU Qiang , WANG Jian-Guo , DING Huai-Bo , ZHAI Jian . Triaxial shape in ¹²⁹Ce. Chinese Physics C, 2008, 32(S2): 141-142.
[15]	WU HuiFang , HUANG Tao . Half-Life and the Nuclear Matrix Element of the 2νββ Decay in ⁷⁶Ge. Chinese Physics C, 2000, 24(6): 589-592.
[16]	Zhu Shengjiang , J. H. Hamilton , A. V. Ramayya , L. Chaturvedi , J. Kormicki , X. W. Zhao , I. Y. Lee , N. R. Johnson , C. Backtach , F. K. McGowan , M. L. Halbert , J. D. Cole . Research on High Spin States of ⁶⁸Ge,⁶⁵Ga and ⁶⁷Ga. Chinese Physics C, 1992, 16(S2): 211-217.
[17]	ZHU Sheng-Jiang . Research on High Spin States in ⁶⁸Ge,⁶⁵Ga and ⁶⁷Ga. Chinese Physics C, 1992, 16(6): 539-545.
[18]	Jiang Huanqing , Li Yangguo . Surface Production of η Particles in π-A Collisions. Chinese Physics C, 1988, 12(S4): 387-392.
[19]	ZHAO ZHI-ZHENG , SUN XI-JUN . LIFETIME MEASUREMENTS OF EXCITED STATES IN ⁷⁶Kr. Chinese Physics C, 1982, 6(2): 255-260.
[20]	Zhang Jin-ye . WHAT ARE REALLY THE PROPERTIES OF THE TRIPLE BAND FORKING IN ⁶⁸Ge?. Chinese Physics C, 1980, 4(5): 649-651.

Access

Get Citation

YANG Qiong, WANG Hua-Lei, CHAI Qing-Zhen and LIU Min-Liang. Total Routhian surface calculations of triaxial or γ-soft propertiesin even-A N=76 isotones with 54≤Z≤68[J]. Chinese Physics C, 2015, 39(9): 094102. doi: 10.1088/1674-1137/39/9/094102

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2014-12-16
Revised: 1900-01-01

Article Metric

Article Views(1466)
PDF Downloads(168)
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

Total Routhian surface calculations of triaxial or γ-soft propertiesin even-A N=76 isotones with 54≤Z≤68

Corresponding author: WANG Hua-Lei,

Received Date: 2014-12-16
Accepted Date: 1900-01-01
Available Online: 2015-09-05

Abstract: Total Routhian surface (TRS) calculations for even-even N=76 isotones with 54≤Z≤68 have been performed in three-dimensional (β₂, γ, β₄) deformation space. Calculated results of the equilibrium deformations are presented and compared with other theoretical predictions and available experimental data. The behavior of collective angular momentum shows the neutron rotation-alignment is preferred in the lighter N=76 isotones, while for the heavier ones the proton alignment is favored. Moreover, multi-pair nucleon alignments and their competition (e.g., in ¹⁴⁴Er) are predicted. It is pointed out that these nuclei in the N=76 isotonic chain exhibit triaxiality or γ softness in high-spin states as well as ground states. Based on deformation-energy curves with respect to axial and non-axial quadrupole deformations, the shape instabilities are evaluated in detail and predicted, particularly in γ direction. Such instabilities are also supported by the odd- and even-spin level staggering of the observed γ bands, which is usually used to distinguish between γ-rigid and γ-soft asymmetry.