凝聚态环境对超低能区Li+d/p反应的屏蔽效应及其机理研究

项目名称： 凝聚态环境对超低能区Li+d/p反应的屏蔽效应及其机理研究

项目编号： No.11305080

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 方开洪

作者单位： 兰州大学

项目金额： 22万元

中文摘要： 在凝聚态环境中发生的超低能区轻核聚变反应，由于大量环境电荷的存在，反应核子间的库仑位垒将受到显著地影响，进而改变核反应截面。这一现象(屏蔽效应)可导致对现有天体核物理理论的再认识和对核聚变理论及核武器设计的必要修正，是目前国际热点研究课题之一。本工作旨在研究不同环境电荷对超低能区(E<70 keV)6Li+d和7Li+p反应的屏蔽效应，通过比较屏蔽势差异揭示屏蔽效应的机理，进而更准确地描述恒星等离子体环境中的物质嬗变过程，并为核聚变、核武器研究提供超低能区的核数据。研究内容涉及载体材料的种类、物相、温度等因素对屏蔽效应的影响，在此基础上探索不同环境电荷(束缚电子、传导电子和重离子)对屏蔽效应的贡献，即屏蔽效应的机理研究。本课题邀请该领域知名教授J. Kasagi参与，为本课题提供技术和设备支持。本研究团队拥有自主实验装置，并长期从事该领域的研究工作，为本研究工作积累了丰富的经验。

中文关键词： 低能区核反应；屏蔽效应；材料相关性；物相相关性；温度相关性

英文摘要： The cross section of light nuclear fussion reaction occurred in condensed matters in ultra-low energy region, would be enhanced remarkably due to the various environmental charges which affect the Coulomb barrier of interaction particles. This phenomenon (Screening Effect) is an active research subject currently, which might lead to further discussion on present astrophysical theory, and necessary modification of the fusion nuclear reaction theory and nuclear weapons designing. This proposal aims to research the screening effect of 6Li+d and 7Li+p reactions immersed in different environmental charges in ultra-low energy region (E <70 keV), to reveal the mechanism of screening effect by comparison. Thus, to simulate more accurately the complexity and particularity of various nuclear astrophysical processes, also to obtain the nuclear data in low energy region for nuclear fusion theory and nuclear weapon designing. The research content involves the influence of variety, phase and temperature of carrier material on screening effect, further to explore the individual contribution of each environmental charge (bound electron, conduction electron and ion) to the screening effect. That is namely the mechanism research of screening effect. Our research group invited professor J. Kasagi to join us, that would provide bot

英文关键词： nuclear reaction in low-energy region；screening effect；material dependence；phase dependence；temperature dependence