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Figure 2
Measured scattering cross section from Ar (blue), He (red) and air (magenta) as a function of neutron wavelength. Measurements were made with an 18 cm path length of gas at room temperature and P = 1 × 105 Pa and L2 = 1.33 m and by averaging the intensity on the detector over the scattering angle range 2 ≤ θ ≤ 24°. Solid lines are obtained using equations (6)[link]–(9)[link][link][link] with Gθ(0) = 1. The air cross sections are rescaled by a factor of 0.1 to compress the vertical axis.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 48| Part 4| August 2015| Pages 1055-1071
https://doi.org/10.1107/S1600576715010729
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