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![[Figure 15]](ks5470fig15mag.jpg)
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Figure 15
Inelastic scattering from a silicon single crystal, with the beam direction aligned along the [220] crystal direction and incident neutron wavelength λ0 = 8 Å. The beam was pulsed with a disc chopper. Events were recorded in time-of-flight mode, and all neutron events with time channels corresponding to quasi-elastic scattering were removed. The left and lower axes indicate the pixel position on the 128 × 128 two-dimensional detector. The upper and right axes give the q value in Å−1. The color scale gives the absolute scale of the intensity in units of cm−1 sr−1. The cross section was not corrected for the wavelength dependence of the 3He detector. Note the rich structure provided by the optical phonon modes at larger q. The inelastic scattering cross section for q < 0.1 Å−1, within the typical range for SANS measurements, was nearly flat and appreciable in intensity at I(q) ≃ 5 × 10−4 cm−1 sr−1. |
![[Figure 15]](ks5470fig15.jpg)
 | JOURNAL OF APPLIED CRYSTALLOGRAPHY |
ISSN: 1600-5767
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