Diffuse reflection of ultracold neutrons from low-roughness surfaces F. Atchison, M. Daum, R. Henneck, S. Heule, M. Horisberger, M. Kasprzak, K. Kirch, A. Knecht, M. Kużniak, B. Lauss et al. (7 more) Eur. Phys. J. A, 44 1 (2010) 23-29 Published online: 10 March 2010 DOI: 10.1140/epja/i2010-10926-x