Covariance analysis of an isospin-dependent probe

Based on a modified quantum molecular the nuclear stopping of reaction systems with different dynamics model, we calculate the neutron-proton ratio and symmetry potentials and collision cross sections. We perform correlations of several probes using the covariance data processing method. It is shown...

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Bibliographic Details
Published inChinese physics C Vol. 39; no. 12; pp. 33 - 38
Main Author 郭文军 李宪杰 黄江伟 王阔 张霄吉
Format Journal Article
LanguageEnglish
Published 01.12.2015
Subjects
Beams (radiation)
Collision dynamics
Correlation
Covariance
Cross sections
Dynamical systems
Mathematical models
Symmetry
中子-质子比
动力学模型
协方差分析
反应体系
同位旋相关
探针
数据处理方法
核子-核子碰撞截面
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Summary:Based on a modified quantum molecular the nuclear stopping of reaction systems with different dynamics model, we calculate the neutron-proton ratio and symmetry potentials and collision cross sections. We perform correlations of several probes using the covariance data processing method. It is shown that the correlation between the nuclear stopping and the isospin-dependent nucleon-nucleon cross sections is strong, but the nuclear stopping and symmetry potentials have a weak correlation. The correlation between neutron-proton ratio and symmetry potentials in the case of low energy is stronger. The correlation between neutron-proton ratio and isospin-dependent collision cross sections is enhanced with the increase of energy, but remains weak. In addition, the correlations of the emission numbers of the deuteron with the symmetry potentials and collision cross sections at different beam energies are not obvious compared to two prior physical quantities. In this paper, we define a parameter to quantitatively describe the sensitivity of isospin-dependent probes. By analyzing this parameter, one can extract more information about the isospin effects of the physical quantity.
Bibliography:GUO Wen-Jun, LI Xian-Jie, HUANG Jiang-Wei, WANG Kuo, ZHANG Xiao-Ji（ University of Shanghai for Science and Technology, Shanghai 200093, China）
11-5641/O4
isospin-dependent probe, correlation, covariance
Based on a modified quantum molecular the nuclear stopping of reaction systems with different dynamics model, we calculate the neutron-proton ratio and symmetry potentials and collision cross sections. We perform correlations of several probes using the covariance data processing method. It is shown that the correlation between the nuclear stopping and the isospin-dependent nucleon-nucleon cross sections is strong, but the nuclear stopping and symmetry potentials have a weak correlation. The correlation between neutron-proton ratio and symmetry potentials in the case of low energy is stronger. The correlation between neutron-proton ratio and isospin-dependent collision cross sections is enhanced with the increase of energy, but remains weak. In addition, the correlations of the emission numbers of the deuteron with the symmetry potentials and collision cross sections at different beam energies are not obvious compared to two prior physical quantities. In this paper, we define a parameter to quantitatively describe the sensitivity of isospin-dependent probes. By analyzing this parameter, one can extract more information about the isospin effects of the physical quantity.
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/39/12/124101