Neutron lifetime and density of states of fluoropolymers at low temperatures
E. A. Goremychkin, Yu. N. Pokotilovski
Joint Institute for Nuclear Research, 141980 Dubna, Russia
Abstract
Present status of the measurements of the neutron lifetime is
shortly reviewed.
We report the inelastic neutron scattering measurement of the density
of vibrational states G(ω) of two fluoropolymers which are
promising
coating materials for the storage of ultracold neutrons (UCN) in closed
volumes covered with polymer film.
From determined G(ω) we calculate the expected UCN loss
coefficients.