摘要
本实验利用101 MeV和59 MeV的16O轰击197Au靶对实验中的硅条探测器位置进行了刻度。利用反应产生的准弹散射粒子16O得到在两个能量下此系统的准弹散射角分布,通过对角分布的分析,观察到实验角分布数据合理,符合重离子在重靶上的弹性散射角分布的图像规律,说明实验中用到的硅条探测器系统定位准确,能够用于弹性散射角分布的实验研究。
Background： Elastic scattering is induced by weakly unstable nuclei. Generally, a good angular resolution for angular distribution of elastic scattering is needed. The silicon strip detector is often used for this kind of experiment. Purpose： In order to use silicon strip detector to study the elastic scattering of weakly unbound nuclei, it is important to get the information of its position calibration. It is well known that the elastic scattering of stable nuclei has a good angular distribution and many experimental data have been obtained. Methods： So the scattering of stable nuclei can be used to calibrate the position information of silicon strip detector. In this experiment, the positions of silicon strip detectors are calibrated using 101 MeV and 59 MeV ^16O scattering on the ^197Au target. Results： The quasi-elastic peaks can be observed in the silicon strip detectors and the counts of quasi-elastic ^16O can be obtained. The solid angles of the silicon strip detectors are calibrated by using alpha source which has three alpha energy values. The angular distribution of quasi-elastic scattering of ^16O＋^197Au is obtained at these two energy values. Conclusions： The experimental data of angular distribution are reasonable and fit for the principle of angular distribution of elastic scattering. It is concluded that in the experiment these silicon strip detectors can accurately give the position information and can be used for the elastic scattering experiment.
出处
《核技术》
CAS
CSCD
北大核心
2013年第8期71-75,共5页
Nuclear Techniques
基金
国家自然科学基金(11035007
11235002
11175011)
北京航空航天大学研究生院教学改革项目
SRTP项目
全国大学生创新创业计划项目资助
关键词
准弹性散射
角分布
硅条探测器
Quasi-elastic scattering, Angular distribution, Silicon strip detector
