keV量级惰性中微子暗物质探测的背景研究

发布时间：2018-01-19 00:05

本文关键词： keV量级惰性中微子暗物质信号电子钌原子束缚态散射　出处：《华东理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：暗物质是宇宙中物质的重要组成部分,研究其本质是现代科学的一项重要任务。目前暗物质有很多候选者,其中就包括惰性中微子。通过放射性原子(如氚原子3H或钌原子106Ru)的β衰变实验有可能探测到keV量级的惰性中微子暗物质。这种暗物质候选者的信号来自中微子捕获过程vs+N'→N+e-所产生的单能电子,这种信号电子能量将超出β衰变能谱末端很多,而不会被β衰变N'→N+e-+ve本身所干扰。另一种可能产生的背景电子是对探测中微子暗物质的潜在威胁,它是通过太阳中微子与靶材料中的电子散射所产生的电子。在这篇论文中,我们就深入研究这种背景电子,并讨论这种背景对探测keV量级惰性中微子暗物质有何影响,其中重点研究的是,当末态电子的动能与束缚能在同一量级时,钌原子中束缚态电子特性对散射过程的影响。
[Abstract]:Dark matter is an important part of matter in the universe, and studying its nature is an important task in modern science. There are many candidates for dark matter, including inert neutrinos. Through radioactive atoms (such as tritium 3H or ruthenium 106Ru). It is possible to detect keV order of magnitude inert neutrino dark matter in beta decay experiments. The signal for this dark matter candidate comes from the neutrino capture process vs N' 鈫扐 single energy electron produced by Ne-a signal whose electron energy will exceed the end of the beta decay spectrum much more than the beta decay energy spectrum, but not by the beta decay N'. 鈫扐nother possible background electron is a potential threat to the detection of neutrino dark matter. It is produced by the scattering of electrons from solar neutrinos and target materials. In this paper we study the background electrons in depth. The influence of this background on the detection of keV inert neutrino dark matter is also discussed, especially when the kinetic energy of the final electron is of the same order of magnitude as the binding energy. The effect of the electronic properties of bound states on the scattering process in ruthenium atom.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P145.9;O572.2

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