酸洗比色法在直链烷基苯生产质量控制中的应用

对于首次应用于大亚湾中微子物理实验的液体闪烁介质——直链烷基苯( LAB)的工业化生产,其最重要的质量控制指标为光衰减长度,这通常需要在实验室里利用专门仪器进行测量分析.经过对比研究,在LAB工业化生产流程的基础上,建立了相应的测试方法——酸洗比色分析方法,即使直链烷基苯和98.4％的发烟硫酸反应,在波长403 nm处...     

融入水电站知识的大学物理教学尝试

针对目前大学物理课程教学与学生的专业课程关系疏离的情况,介绍了笔者在水利水电类专业开展融入水电站知识的大学物理教学尝试的一些案例以及教学中得到的想法和体会.     

Scintillating properties of LiYSiO_4:Ce

LiYSiO₄:Ce is a promising scintillator and some of its properties have been reported in previous papers. In this paper, samples doped with different concentrations of Ce are prepared and studied. First, the relative light yields of the samples are measured as 28.1%-37.1% compared with a standard anthracene crystal being irradiated by α particles and as ～ 27.2% compared with NaI being irradiated by X-rays. Second, the effects of sample thicknesses on light yields are presented. Finally the timing behaviors of samples with different doped concentrations being irradiated with alpha particles and X-rays are discussed. The result shows that LiYSiO₄:Ce is a kind of fast scintillator ( ～ 30 ns) with a moderate light yield that can be used for neutron detection.