This example demonstrates beam angular spread effects in reflectivity computations. It also offers a comparison with data generated using another well known code: GenX. Further information about reflectometry simulations can be found in the Reflectometry Simulation Tutorial.
The observed reflectometry signal can be affected either by a spread in the beam wavelength or in the incident angle.
In this example, a Gaussian distribution is used to spread the incident angle, with a standard deviation of $\sigma_{\alpha} = 0.01^{\circ}$.
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Reference data: Examples/data/genx_angular_divergence.dat.gz