I(q) function calculator
This Javascript calculates the scattering curve I(q) of models consisting of up to 12 spheres with different x/y/z coordinates and optionally different radii and different electron densities using the Debye-formula in reciprocal space. Enter the number of spheres, their coordinates x(i), y(i), z(i), their radii r(i) and their electron-densities c(i). The spheres can also overlap (totally or partially) where the resulting electron density of the overlapping region is the sum of the overlapping electron densities. For N points the scattering curve from q = 0 to qz with a scaling factor f (optionally also in a logarithmic intensity scale) will be calculated. The values are listed in q vs I(q) or vs log(I(q)) in arbitrary units and can be copied and pasted from the window into any text-file for further processing and graphical displaying.

Input I(q) action
 qz n f x(1) y(1) z(1) r(1) c(1) x(2) y(2) z(2) r(2) c(2) x(3) y(3) z(3) r(3) c(3) x(4) y(4) z(4) r(4) c(4) x(5) y(5) z(5) r(5) c(5) x(6) y(6) z(6) r(6) c(6) x(7) y(7) z(7) r(7) c(7) x(8) y(8) z(8) r(8) c(8) x(9) y(9) z(9) r(9) c(9) x(10) y(10) z(10) r(10) c(10) x(11) y(11) z(11) r(11) c(11) x(12) y(12) z(12) r(12) c(12)

 spheres 12 11 10 9 8 7 6 5 4 3 2 1 I(q) log I(q) Rg

### I(q)-plot

Author: M.Kriechbaum, TU-Graz (2020), e-mail: manfred.kriechbaum@tugraz.at