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Software for IRIS/OSIRIS data analysis

Data Reduction involves converting measured time-of-flight (tof) data into S(Q,ω). Operations include:

•  Converting from tof to energy transfer (or other units eg. d-spacing
•  Summing of spectra into groups and converting from detector angle to Q-value
•  Absorption, empty cell and multiple scattering corrections (if necessary)

Data Analysis refers to science-based interpretation of the reduced data. Operations include:

•  Fitting QE peaks using the convolution method
•  Calculating peak parameters using Bayesian analysis
•  Fitting peak widths to diffusion/rotation models
•  Performing Fourier Transformation of S(Q,ω) to I(Q,t)
•  Fitting scattering functions to stretched exponential decays  

In addition to MODES, other packages that can be used to analyse data from OSIRIS are:

• DAVE
• MSLICE (see manual)

OSIRIS diffraction

To analyse diffraction patterns taken with OSIRIS, you are advised to use ARIEL.