Improved measurement of the neutron absorption cross section for very low velocities
J. Schroffenegger, P. Fierlinger, A. Hollering and 4 more
Physics Letters B · 2016
doi:10.1016/j.physletb.2015.11.030 (opens in a new tab)
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Abstract
The absorption cross section of natural Gd and isotopic enriched 157Gd for ultra-cold neutrons (UCN) as a function of the velocity has been measured within a time-of-flight-experiment. Particular attention is paid to small velocities in the region of a few m/s. This is intended to determine the validity of the 1/v-law governing absorption cross sections in this region and the resulting divergence at v=0. The experiment does not show any significant violation of 1/v for v>3 m/s.
Abstract licence: CC BY
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