High-Spin States and Level Structure in Stable Nucleus Strontium-84

被引：0
|
作者：
Shen, Shuifa [1 ,2 ,3 ]
Han, Guangbing [4 ]
Wen, Shuxian [5 ]
Kang, Xuzhong [6 ]
Yan, Yupeng [2 ]
Bai, Zhijun [3 ]
Wu, Yican [1 ]
Wu, Xiaoguang [5 ]
Zhu, Lihua [7 ]
Li, Guangsheng [5 ]
He, Chuangye [5 ]
机构：
[1] Chinese Acad Sci, Inst Nucl Energy Safety Technol, Hefei 230031, Peoples R China
[2] Suranaree Univ Technol, Inst Sci, Sch Phys, Nakhon Ratchasima 30000, Thailand
[3] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
[4] Shandong Univ, Sch Phys, Jinan 250100, Peoples R China
[5] China Inst Atom Energy, Beijing 102413, Peoples R China
[6] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
[7] Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China
来源：
SCIENTIFIC REPORTS | 2013年 / 3卷
基金：
中国国家自然科学基金;
关键词：
MEAN-FIELD DESCRIPTION; ROTATIONAL BANDS; MASSES; ENERGIES;
D O I：
10.1038/srep02740
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
High-spin states of Sr-84 are populated through the reaction Zn-70 (O-18, 4n) Sr-84 at the beam energy of 75 MeV. The measurements of excitation functions, gamma-gamma coincidences, directional correlations of oriented states (DCO) ratios and gamma-transition intensities are performed using eight anticompton HPGe detectors and one planar HPGe detector. Based on the experimental results, we establish a new level scheme of Sr-84, in which 12 new states and nearly 30 new gamma-transitions are identified in the present work. The positive-parity yrast band is extended to spin I-pi = 24(+), while one negative-parity band is extended to spin I-pi = 19(-) and it is found that the even-spin and odd-spin members in high-spin states show the nature of signature staggering. The deformation of Sr-84 is studied by calculating the total-Routhian-surfaces (TRS) of positive-parity yrast states in the cranked shell model formalism.
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页数：7
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