Core Findings - The research team led by the University of Chinese Academy of Sciences has directly observed the Migdal effect, 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 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 electron release process during single atom motion [2] - Utilizing a compact deuterium-deuterium fusion reaction neutron source, the device distinguishes the unique trajectory of "Migdal events" from background interference such as gamma rays and cosmic rays [2] Implications and Future Directions - This achievement fills a long-standing gap in experimental verification of the Migdal effect, reinforcing its theoretical foundation and showcasing 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]
我国科研团队首次直接观测到米格达尔效应 为轻暗物质探测迈出坚实的一步
Xin Hua She·2026-01-14 16:09