我国科研团队首次直接观测到米格达尔效应

Core Findings - The research team led by the University of Chinese Academy of Sciences has directly observed the Migdal effect for the first time, providing crucial support for breakthroughs in light dark matter detection [1][2] - The Migdal effect, proposed by physicist Arkadi Migdal in 1939, involves energy transfer from an atomic nucleus to its outer electrons during recoil, allowing electrons to escape atomic binding [1] Research Methodology - The team developed a highly sensitive detection device combining a "micro-structured gas detector" and a "pixel readout chip," functioning like a "camera" to capture the process of electron release during single atom motion [2] - Utilizing a compact deuterium-deuterium fusion reaction neutron source, the device distinguishes the unique tracks of nuclear recoil and Migdal electrons from background interference [2] Implications and Future Directions - This achievement fills a long-standing gap in experimental verification of the Migdal effect and strengthens its theoretical foundation, showcasing the capabilities of domestic high-quality gas detection technology [2] - The research team plans to collaborate with dark matter detection experiment teams to integrate these findings into the development of next-generation detectors, emphasizing the importance of dark matter in understanding the universe's origins and evolution [2][3]