INVESTIGATION OF LIQUID FLUOROPOLYMERS AS POSSIBLE MATERIALS FOR LOW-TEMPERATURE LIQUID WALL CHAMBERS FOR ULTRACOLD-NEUTRON STORAGE
Pokotilovski Yu.N.

Received: April 27, 2002

PACS: 29.30.-h, 61.12.-q, 61.25.Hq

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Several hydrogen-free liquid low-temperature fluoropolymers are investigated from the point of view of their possible use as the material for walls of ultracold-neutron traps with low losses. Viscosity was measured in the temperature range 150-300 K and neutron scattering cross-sections were measured in the temperature range 10-300 K and in the neutron wavelength range 1-20 . Some conclusions are made for their possible ultracold-neutron bottle properties. Quasi-elastic neutron reflection from the surface of a viscous liquid is considered in the frame work of the Maxwell dynamic model.