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Figure 7
(a) Complex space scattering coefficients [b_{p\semi l,m}] for a two-body problem for np = 1.01, kd = 3ka with increasing radius ka. Only the coefficients for sphere p = 2 and m = 0 are shown. The coefficients were computed from full T-matrix (open circles), in the forward scattering approximation (squares) and the kinematic approximation (diamonds). (b) Comparison of far-field scattering amplitudes for N = 2, ka = 30, np = 1.01, kd = 2ka using full T-matrix (solid blue), in forward approximation (green dashed line) and kinematic approximation (red dashed–dotted). The forward approximation is indistinguishable from the exact solution in this case.

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ISSN: 2053-2733
Volume 79| Part 2| March 2023| Pages 180-191
https://doi.org/10.1107/S2053273322011779
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