Si-Sn合金精炼-定向凝固过程硅的分离和提纯

采用sn-si熔析体系，利用工业规模多晶硅铸锭炉通过控制温度梯度和热场上移速率进行定向凝固处理，研究硅锭的形貌特征、组织结构和提纯效果。结果表明：在定向凝固过程中析出了连续密实的硅晶，且晶体硅与金属熔析剂之间形成了平坦稳定的相界面，实现晶体硅与金属熔析剂的有效分离。晶体硅经过混酸酸洗后，总金属杂质含量由58.3×10^-6降低为7．6×10^-6，去除率可以达到87％；非金属P含量由50．12×10^-6。降低为8．48×10^-6，去除率大于80％。因此，Si-Sn合金精炼与定向凝固过程复合，解决了硅与金属熔析剂的有效分离问题，同时也实现了杂质的高效去除

Si-Sn合金精炼-定向凝固过程硅的分离和提纯

采用sn-si熔析体系，利用工业规模多晶硅铸锭炉通过控制温度梯度和热场上移速率进行定向凝固处理，研究硅锭的形貌特征、组织结构和提纯效果。结果表明：在定向凝固过程中析出了连续密实的硅晶，且晶体硅与金属熔析剂之间形成了平坦稳定的相界面，实现晶体硅与金属熔析剂的有效分离。晶体硅经过混酸酸洗后，总金属杂质含量由58.3×10^-6降低为7．6×10^-6，去除率可以达到87％；非金属P含量由50．12×10^-6。降低为8．48×10^-6，去除率大于80％。因此，Si-Sn合金精炼与定向凝固过程复合，解决了硅与金属熔析剂的有效分离问题，同时也实现了杂质的高效去除

Si-Sn 合金精炼-定向凝固过程硅的分离和提纯

采用sn-si熔析体系，利用工业规模多晶硅铸锭炉通过控制温度梯度和热场上移速率进行定向凝固处理，研究硅锭的形貌特征、组织结构和提纯效果。结果表明：在定向凝固过程中析出了连续密实的硅晶，且晶体硅与金属熔析剂之间形成了平坦稳定的相界面，实现晶体硅与金属熔析剂的有效分离。晶体硅经过混酸酸洗后，总金属杂质含量由58.3×10^-6降低为7．6×10^-6，去除率可以达到87％；非金属P含量由50．12×10^-6。降低为8．48×10^-6，去除率大于80％。因此，Si-Sn合金精炼与定向凝固过程复合，解决了硅与金属熔析剂的有效分离问题，同时也实现了杂质的高效去除

同步辐射单光子电离技术研究航空煤油替代燃料环烷烃的热解反应

将同步辐射真空紫外单光子电离技术与分子束质谱相结合研究航空煤油替代燃料环己烷的热解机理。实验有两种模式,一是固定光子能量,改变热解炉的温度,可以得到不同温度下产物的分布情况;二是通过扫描光子能量,测量光电离效率谱,可以区分同分异构体。通过先进的热解诊断技术研究复杂的热解过程,建立相对全

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies