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The wavelength change of neutrons scattered inelastically from liquid helium at several temperatures was measured at angles of scattering of 45.4 deg 90, 35, and 80 deg . At the lowest liquid temperatures, the broadening due to the liquid helium is <0.5 deg K;. At the lowest liquid temperature thcre is a well defined change in wavelength of the scattered neutrons. The corresponding changes in energy and momentum of the scattered neutrons were calculated for each angle. (W.D.M.)
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D. G. Henshaw (1958) studied this question.
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