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Radius of gyration calculator
This Javascript calculates the Radius of Gyration of 3-dimensional concentric shell models (ellipsoid, cube or cylinder). Enter the number of shells, the lengths of the respective semi-axis Rx(i), Ry(i) and Rz(i) (z is in the axis of rotation) and the corresponding electron-density c(i) (between R(i) and R(i-1)). The values of the radius of gyration Rg and of the zero-angle intensity I(0), respectively, will be calculated. Units are arbitrary and in metric dimensions (in small-angle scattering (SAS) usually in Å or nm).

Input Radius of Gyration
Rx(1) Ry(1) Rz(1) c(1)
Rx(2) Ry(2) Rz(2) c(2)
Rx(3) Ry(3) Rz(3) c(3)
Rx(4) Ry(4) Rz(4) c(4)
Rx(5) Ry(5) Rz(5) c(5)
Rx(6) Ry(6) Rz(6) c(6)
shells
ellipsoid
cube
cylinder
Rg
I(0)

Author: M.Kriechbaum, IBR (2002), e-mail: manfred.kriechbaum@oeaw.ac.at