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Fig. 1.


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Polarization-dependent differential cross-section (1/σT) dσ11/d cos θ′ as a function of photon energy E = ℏω for a set of incident angles θ and scattered angles θ′. The set of angles is 0, 30, 60, and 90 degrees, with θ changing vertically and θ′ horizontally. The red solid lines are produced from the expression of Sina (1996), while the black dashed ones are produced from the expression of Harding & Daugherty (1991). In all cases, the resonant frequency is given by expression (7). The vertical line indicates the resonant frequency ωr, which for θ ≠ 0 is smaller than ωc. Here, Ec = ℏωc = 15.33 keV.

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