High-spin states and level structure in stable nucleus strontium-84.
High-spin states of (84)Sr are populated through the reaction (70)Zn ((18)O, 4n) (84)Sr at the beam energy of 75 MeV. The measurements of excitation functions, γ-γ coincidences, directional correlations of oriented states (DCO) ratios and γ-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 (84)Sr, in which 12 new states and nearly 30 new γ-transitions are identified in the present work. The positive-parity yrast band is extended to spin I(π) = 24(+), while one negative-parity band is extended to spin I(π) = 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 (84)Sr is studied by calculating the total-Routhian-surfaces (TRS) of positive-parity yrast states in the cranked shell model formalism.
1] Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei 230031, China [2] School of Physics, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand [3] State Key Laboratory of Nuclear Physics and Technology (Peking University), Beijing 100871, China [4] Thailand Center of Excellence in Physics (ThEP), Commission on Higher Education, Thailand.
Shuifa
S
Shen
Guangbing
G
Han
Shuxian
S
Wen
Xuzhong
X
Kang
Yupeng
Y
Yan
Zhijun
Z
Bai
Yican
Y
Wu
Xiaoguang
X
Wu
Lihua
L
Zhu
Guangsheng
G
Li
Chuangye
C
He