Calculations of the Mie scattering coefficients for multilayered particles with large size parameters
2001
Abstract The calculation procedure for the scattering coefficients appearing in the Mie theory is discussed for a case of multilayered particles with a large size parameter. There are two different aspects to the problem. The first aspect concerns a case where the imaginary part of the size parameters remains small. Shown here is the possibility for avoiding the canonical recommendations which prescribe using both upward and downward recursions for different types of Bessel functions. We have justified the procedure based on the upward recursions only where results are as stable as those in the canonical one. The second aspect concerns the case with a large imaginary part of the size parameter. The calculation procedure for a multilayered particle fails in such a case because of 0/0-type uncertainty. However, this problem can be overcome by using the proper asymptotic relations at crucial points. The numerical results are demonstrated for spherical and cylindrical multilayered particles.
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