Studies on Reflector Materials for Cold Neutrons

Neutron scattering techniques and neutron applications in general are powerful and well-established tools for research in science and technology. However, those are highly intensity-limited techniques and the need to reduce the neutron loses between their source to detection is then an imperative endeavor. In particular, great effort has been devoted to the development of efficient ways to transport and guide neutron beams, as well as to reduce the flux leakage in the non-emitting sides of moderator systems. In this work we investigate and confirm by calculation in a real material the great quality of diamond nanoparticles as reflector for ultra-cold and very-cold neutrons, and propose the use of Magnesium Hydride at a low temperature as a very good reflector for cold neutrons