Figure 4
Time-of-flight measurements for neutrons of wavelength 5.4 (open circles), 8 (filled circles) and 12 Å (open diamonds). The intensities have been rescaled to unity for convenience. Measurements were made with a chopper (5 mm slit and 23 cm radius) at a rotation speed of 3000 .r.p.m. and 2 mm diameter pinhole; the detector is located at 3.22 m from the chopper. The instrumental spreading is approximately 0.24 Å. |