Monte Carlo simulation of nonstationary transport of ultracold neutrons in horizontal neutron guides and the storage of ultracold neutrons

The results are presented of a Monte Carlo simulation of nonstationary transport of ultracold neutrons (UCNs) in straight and curved neutron guides of rectangular cross section for different suppositions about the losses and the character of diffuse neutron scattering by imperfectly smooth reflecting surfaces. The storage of UCNs in experimental chambers is modelled for the case of a low periodic or aperiodic pulse neutron source for production of UCNs.