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Fig. 1.
Fig. 1. (a) Schematic view of X-ray scattering. The wavevectors of the incident and scattered X-rays are ki and kf, respectively. In most cases, elastic scattering occurs while keeping the magnitude of the scattering wavevector equal to that of the incidence wave vector, as shown in the inset figure. Momentum transfer of X-rays is defined as Q = kfki , and if two wavevectors exist in the x-z plane (scattering plane), Q = 2kz. Actually, Q is the wavevector transfer since the momentum of photon is defined as k, however we can ignore the constant and consider the wavevector transfer as the momentum transfer (as a physical quantity). (b) Scattering angle related to correlated lengths of scatterers such as nano-structures and atomic structures.
Applied Science and Convergence Technology 2022;31:128~132
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