我国科研团队首次证实米格达尔效应

Group 1 - The core achievement of the research is the first direct experimental confirmation of the Migdal effect in a neutral particle collision scenario, marking a significant step forward in the detection of light dark matter [1] - The Migdal effect, proposed by physicist Arkadi Migdal in 1939, describes how energy gained by an atomic nucleus can transfer to outer electrons, allowing them to escape the atomic binding, thus converting undetectable low-energy nuclear recoil signals into observable electronic signals [1] - The breakthrough in this research is attributed to advancements in detector performance, specifically a gas pixel detector developed by Guangxi University, which took over 10 years to create and was completed in 2023 [1] Group 2 - The experimental team utilized a highly sensitive detection device, likened to a "camera" that captures the process of electron release during atomic motion, successfully "photographing" the unique trajectory formed by nuclear recoil and Migdal electrons [2] - The experiment not only validated the Migdal effect but also provided the first measurement of the ratio of the effect's cross-section to the nuclear recoil cross-section, offering crucial calibration data for international dark matter experiments [2]