The amplitude of light scattering by a hexagonal column with hollow ends in the Rayleigh-Gans-Debye approximation

The formulas for light scattering amplitude and phase function [or element of scattering matrix f11] of hexagonal column with concave ends in the Rayleigh-Gans-Debye (RGD) approximation are derived. Numerical results for the phase function of light scattering of hexagonal column with pyramidal hollow ends in the RGD approximation and in the method of Purcell-Pennypacker (or discrete dipole method, or coupled dipole method) are compared. The good agreement for hexagonal columns having small phase shifts has been found.