12C+13C熔合截面测量中统计模型引入的系统误差研究（英文）

Study of the Systematic Errors Introduced by the Statistical Model in the Measurement of 12C+13C Fusion Reaction

在本工作中,我们分别采用薄靶和厚靶实验技术,测量了12^C+13^C反应在质心系能量4~6 MeV的熔合截面。实验得到了12^C+13^C反应的在线γ产额和离线的24Na活度,利用TALYS统计模型给出的反应道分支比,导出了熔合反应的总截面。通过对比不同实验得到的总截面,定量研究了统计模型修正所带来的系统误差:在线γ分支比修正引入的系统误差为14%;由离线24Na活度测量得到总截面时,24Na分支比修正带来的系统误差也为14%。

The onlineγ-rays and activity decay of 24Na residual produced in the 12^C+13^C reaction are both measured using thick and thin targets in the center-of-mass energy of 4~6 MeV.The total fusion cross section is derived from theγ-ray yields using the theoretical correction calculated by TALYS.Comparing the cross sections obtained by different methods in previous experiments,the systematic errors in the total cross section determination by branching the onlineγ-ray yields and the 24Na channel cross section are both determined to be 14%.