Neutron penetration in air

A Monte-Carlo calculation of the neutron distribution arising from monoenergetic isotropic point sources in an infinite homogeneous medium of normal density is presented. Initial neutron energies of 0.001; 0.025; 0.025; 0.2; 0.8; 2; 5; 10; and 14 MeV are considered. The space-energy and time neutron distribution at distances of 10 to 1300 m from the source are obtained. The results are compared with certain of the authors' experimental data.