The effect of nanodiamond fluorination on quasi-specular reflection of cold neutrons

Orateur : Kirill ZHERNENKOV (University of Waterloo, Canada)

In recent years, powders of detonation diamond nanoparticles provided a record efficiency of quasi-specular reflection of cold neutrons and a record efficiency of diffusive reflection of slower neutrons. The fluorination of diamond nanoparticles increases even further the efficiency of both these process at all relevant neutron energies and incident angles. The removal of hydrogen contaminations from the nanodiamond surface, due to its fluorination, decreases neutron losses associated with their travel through the powder. Besides, the neutron optical potential of the nanoparticle gets sharper on the surface. Thus, the probability of neutron scattering increases. The results of reflectometry measurements with fluorinated and raw nanodiamond powder samples, comparison them to each other and to computer simulations, and possible applications will be given [1].

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