Module ratiocor

source code

RatioIntensity estimates an intensity scan based on the measured intensity from a known scatterer.

You need to perform this type of scan on reflectometers whose beam profile changes as a function of angle, thus making it impossible to measure the beam intensity directly.

Even with the ratio scan the reduction may need a scaling step to recover the absolute intensity.

Note that we will assume that slit opening as a function of angle is identical for the measured intensity and the measured reflection.

We will also assume that the intensity scan and the measured reflection are performed on blanks with identical geometery so the footprint is the same on both. No footprint correction will be required.

Example:

# Compute the intensity scan assuming that data measures
# the specular reflection off 85% water, 15% deuterated water.
data.apply(WaterIntensity(D2O=15))