新疆阿勒泰地区矿产勘查和开发利用战备规划论证研究

内容包括地区区情、矿产勘查开发现状、资源保证程度与预测、矿产经济评价、结构优化、发展模式、矿业区化、战略构想、规划建议与对策；勘查开发与经济发展相结合，总体思想正确，矿业经济划分合理，成矿区及预测区指明了找矿方向，实施优势资源转换战略的对策可操作性强，２０１０年前，争取新发现矿产地１００处，可供详查大、中型基地２０处，有色金属新增储量增长５０￣６２％，矿产品采、选、冶总产值约３２亿元；初步应用效果好，有关部门参考引用了该成果的总体思路、发展方针、矿业布局、战略部署、规划建议；矿产勘查和矿业开发的经济效益显著，到本世纪末预计达１５．５９亿元，相当于１９９２年矿产品产值的两番半。有效利用资源与节约原材料，为保护自然资源与生态环境，提供科学依据，社会效益明显

低能碳离子束沉积（111）织构的立方SiC薄膜

在硅衬底上利用具有质量选择功能的低能离子束沉积技术沉积碳离子制备出除碳、硅之外无其他杂质元素的纯净的立方SiC薄膜．利用X射线光电子谱、俄歇电子能谱、X射线衍射对样品进行了表征．结果显示常温和400℃制备的样品为非晶结构，在800℃制备的样品由一富碳的表面层和有着良好化学计量比的SiC层组成，碳化硅晶体薄膜是（111）织构的．通过分析可知衬底温度、离子沉积能量和样品保温扩散时间等因素综合在一起对于在硅上沉积SiC薄膜起着重要作用．远远大于TRIM预测厚度的SiC薄膜的获得是高的衬底温度、一定注入能量的碳离子引起的增强扩散以及通道注入效应综合作用的结果

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