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 # Refractive index calculator
+Author: Charalambos Rossides
+muVIS X-ray imaging centre
+University of Southampton, Southampton, UK
 
-Jupyter script that calls the Center for X-Ray Optics (CXRO) website [1] and retrieves the refractive index for a given material composition and density for low energies (30eV to 30keV).
-[1] http://henke.lbl.gov/optical_constants/getdb2.html
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+Jupyter script that calls the Center for X-Ray Optics (CXRO) website [1] and retrieves the refractive index (tabulated values originally published by [2]) for a given material composition and density for low energies (30eV to 30keV).
+
+This script calls the website, retrieves the data and then plots it in either the typical delta and beta plot or the delta/beta ratio.
+The plots are interactive, so one can hover the mouse and easily retrieve the numerical values. It is also possible to also zoom and pan.
+A scroll bar that controls the material density allows the user to interactively investigate how different densities affect the refractive index.
+
+It also provides functionality for the differential refractive index (the refractive index for the boundary when you have a material inside another material).
+
+[1] http://henke.lbl.gov/optical_constants/getdb2.html
+[2] B. L. Henke, E. M. Gullikson, and J. C. Davis, “X-ray interactions: photoabsorption, scattering, transmission and reflection E= 50-30,000 eV, Z= 1-92”, Atomic data and nuclear data tables, vol. 54, 1993.
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