Direct observation of the Migdal effect induced by neutron bombardment - Difan Yi; Qian Liu; Shi Chen; Chunlai Dong; Huanbo Feng; Chaosong Gao; Wenqian Huang; Xinmei Jing; Lingquan Kong; Jin Li; Peirong Li; Enwei Liang; et al. (Nature, 2026)