In my knowledge, this effect (an edge at about 6 deg 2th) comes from a
scattering of the lower part of the tube housing/shutter window. This
scattered intensity goes straight above the sample, directly into the
detector when no more antiscatter optics follow. Therefore, it can be
observed only
with some materials, I observed powder diffraction patterns (Bragg-Brentano,
X'pert) which
show a broad negative peak around 5-6ยบ(2th), instead of the smoothly descending
intensity
coming from the primary beam.
Did some of you observe the same phenomenon, and has this been dealt with
anywhere?
