A cold/ultracold neutron detector using fine-grained nuclear emulsion with spatial resolution less than 100 nmN. Naganawa, T. Ariga, S. Awano, M. Hino, K. Hirota, H. Kawahara, M. Kitaguchi, K. Mishima, H. M. Shimizu, S. Tada, S. Tasaki and A. UmemotoEur. Phys. J. C, 78 11 (2018) 959DOI: https://doi.org/10.1140/epjc/s10052-018-6395-7