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Calculate reflectivity data

All SLD's are input as the SLD*106.

Usage notes:

You can upload a reflectivity datafile with two columns to the applet. The first column should be Q in A-1 and the second column should be normalized reflectivity. The data will be plotted on the graph along with the calculated model. The columns should be delimited with any number of spaces (not tabs) between the columns.

The format for the various layers in the model are:

Real SLD*106    Imaginary SLD*106     Layer Thickness(Angstroms)
so each layer should have three values in it separated by spaces.

The layers go in order from the fronting medium to the backing medium, and the entire stack of layers can be repeated by changing the number of cells to a number higher than 1.

I will put SLD's for various reference substrate materials as well as a link to the SLD calculator. Silicon is one common substrate material, and it has a scattering length density of 2.08e-6. If you want to make a stack of layers on top of a silicon substrate you would put 2.08e-6 in the field for Backing, Real SLD and define your model in the text area below it.

If you click in the plot area the following commands are available:

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Report errors or make inquiries to Alan Munter, <>

Last modified 22-March-2004 by website owner: NCNR (attn: Alan Munter)