论文标题
具有位置敏感气态检测器的氩和氙核的Migdal效应的检测能力
Detection capability of Migdal effect for argon and xenon nuclei with position sensitive gaseous detectors
论文作者
论文摘要
Migdal效应引起了人们的兴趣，因为有可能增强直接暗物质搜索到低质量区域的敏感性。尽管它非常重要，但尚未在实验上观察到Migdal效应。用蒙特卡洛模拟研究了一种对中子散射中首次观察Migdal效应的现实实验方法。在这项研究中，中子源研究了潜在的背景速率以及Migdal效应的事件速率。发现一个桌顶尺寸的$ \ sim（30 \ rm cm）^3 $填充有氩气或Xenon目标气体的位置敏感的气体探测器可以检测Migdal效应的特征特征签名，并以足够的速度（O（$ 10^2 \ sim10^3 $））。简单的实验设置的模拟结果显示了两个重要的背景源，即内在中子和中子诱导的伽马射线。发现这些背景速率比中子散射中的Migdal效应高得多。这项研究的结果是，可以得出结论，可以通过良好地理解和还原背景来实现中子散射中Migdal效应的实验观察。
Migdal effect is attracting interests because of the potential to enhance the sensitivities of direct dark matter searches to the low mass region. In spite of its great importance, the Migdal effect has not been experimentally observed yet. A realistic experimental approach towards the first observation of the Migdal effect in the neutron scattering was studied with Monte Carlo simulations. In this study, potential background rate was studied together with the event rate of the Migdal effect by a neutron source. It was found that a table-top sized $\sim (30\rm cm )^3$ position-sensitive gaseous detector filled with argon or xenon target gas can detect characteristic signatures of the Migdal effect with sufficient rates (O($10^2\sim10^3$) events/day). A simulation result of a simple experimental set-up showed two significant background sources, namely the intrinsic neutrons and the neutron induced gamma-rays. These background rates were found to be much higher than those of the Migdal effect in the neutron scattering. As a consequence of this study, it is concluded that the experimental observation of the Migdal effect in the neutron scattering can be realized with a good understanding and reduction of the background.
