Magnetic Neutron Scattering in Solid Oxygen and its Applications to   Ultracold Neutron Production
  Using neutron scattering, we investigate the static and dynamic structure functions $S(Q,\omega)$ of 3 distinct solid phases (using powder average techniques), and characterize the corresponding modes of energy excitation, focusing primarily on the dynamics of spin interaction. With the $S(Q,\omega)$ maps, we extract the temperature dependent production rate and upscattering cross section, that are relevant for understanding experimental data on ultracold neutron production in solid oxygen at the saturated vapor pressure. 
C.-Y. Liu, C.M. Lavelle, C.M. Brown
cond-mat.mtrl-sci