Neutron moderation theory with thermal motion of the moderator nuclei V. D. Rusov, V. A. Tarasov, S. A. Chernezhenko, A. A. Kakaev and V. P. Smolyar Eur. Phys. J. A, 53 9 (2017) 179 Published online: 13 September 2017 DOI: 10.1140/epja/i2017-12363-9