Fig. 1.

X-ray and neutron scattering cross sections and coherent scattering lengths (scattering factors) for different elements. Circles and bars are drawn to scale.

Source: X-ray cross sections at 100 keV are according to the values reported in reference [11] . Neutron cross sections are taken from reference [12] . Coherent scattering length and scattering factors are taken from reference [13].