摘要
利用中国原子能科学研究院核工业放射性计量测试中心的5SDH-2串列加速器进行了ST-401薄塑料闪烁体的能量响应实验.选用T(p,n)3He反应和D(d,n)3He反应作为中子源,中子束流采用复合屏蔽体进行准直,源强采用正比计数管和半导体望远镜进行监测,实验测量了厚度从0·16mm到2·00mm的八种规格薄闪烁体的能量响应曲线,对实验的结果的不确定度进行了分析.结果表明探测器的灵敏度随着晶体厚度的增加而增加,对于一定厚度的薄闪烁体,随着中子能量的增加,探测器的能量响应曲线坡度不大.
Using the 5SDH-2 Accelerator at the Radiation Metrology Center of CIAE, the experiment of neutron energy response of the thin ST-401 scintillator has been performed. Two T（p, n）^3 He and D（d, n）^3 He reactions are chosen for generating the neutrons. The neutron beam is collimated with the multiplex shielding system. The source intensity is monitored by the proportional counter or semiconductor proton recoil telescope. The neutron response curves of ST-401 scintillators with thickness from 0. 16mm to 2.00mm are measured versus neutron energy. The uncertainties of experimental results are discussed in detail. The results show that the sensitivity increases with the scintillator thickness, and for the same thickness, the slope of energy response curve does not change greatly with the increase of neutron energy.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第5期2165-2169,共5页
Acta Physica Sinica
关键词
塑料闪烁体
能量响应
正比计数器
半导体反冲质子望远镜
plastic scintillator, energy response, proportional counter, semiconductor proton recoil telescope
