【央视新闻】我国科研团队首次直接证实量子力学预言的米格达尔效应

Core Insights - The research team from the University of Chinese Academy of Sciences, in collaboration with several universities, has directly observed the Migdal effect, a phenomenon predicted by quantum mechanics, which provides crucial support for breakthroughs in light dark matter detection [3]. Group 1: Migdal Effect - The Migdal effect, predicted in 1939 by Soviet scientist Migdal, describes how energy is transferred from a recoiling atomic nucleus to outer electrons during collisions with neutral particles [3]. - For over 80 years since the theoretical prediction, the existence of the Migdal effect in neutral particle collision processes had not been confirmed, leading to skepticism regarding dark matter detection experiments relying on this effect [3]. Group 2: Research Methodology - The research team developed a highly sensitive detection device combining a "micro-structured gas detector" and a "pixel readout chip," functioning like a "camera" that captures the process of electrons being released during single atomic movements [4]. - Using a compact deuterium-deuterium fusion reaction neutron source, the device can distinguish the unique tracks formed by nuclear recoil and Migdal electrons, successfully confirming the Migdal effect for the first time [4]. Group 3: Future Plans - The research team plans to further optimize the performance of the detector and expand observations of the Migdal effect across different elements, aiming to provide data support for the detection of lighter dark matter particles [4].