Elastic Neutron Scattering from Distributed Fusion Neutrons, Deuterium, Tritium, and Lithium, and Multigroup Rate Coefficients

Rate coefficients and normalized differential scattering rate distributions for (n-n), (n-d), (n-t), and (n-⁶Li) elastic reactions for radially translating Maxwellian-distributed targets are examined for energy and temperature ranges related to fusion energies. For these reactions, both asymptotically constant cross sections and cross sections decaying inversely as the relative speed are treated. For the (n-d), (n,t), and (n-⁶Li) cases, actual multigroup cross sections are employed in the energy range from 0 to 17 MeV, while the (n-n) interaction is treated in the hard sphere limit. Some results for various incident and final neutron energies at a target temperature of 2 MeV are listed, and conclusions from an extensive numerical analysis are given.