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19
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ME12044A
6.6
Switching the Measurement Mode
EXAFS is normally measured by the transmission method. However, in cases in which the sample in
question makes it difficult to conduct measurement by the transmission method, such as when the
sample is a film formed on a substrate which is opaque to X-rays or a diluted sample, or when
elements composing the sample other than the object element cause heavy absorption, an EXAFS
spectrum can sometimes be obtained by measuring the Fluorescence Yield (FY). The Looper allows
measurement to be conducted in fluorescence mode when the counter arm is swung up by 90 degrees.
The relevant procedure will be described below.
Figure 6.16 Transmission Mode (Normal Setup) (D030328A04)
First, loosen the screws fastening the sample holder, and rotate it counterclockwise. When the sample
holder is fully rotated within the slotted hole, it is situated at a point inclined by 10 degrees from its
vertical position with respect to the beam.
Figure 6.17 Sample Inclined by 10 Degrees (D030328A05)
Fixing
screws
