Table 1. SLDs of H₂O (solvent), poly(styrene) (sphere) and iron oxide for neutrons and X-rays.

	neutrons	X-rays
ρH2O = ρsolvent	−5.6 · 10−5 1/nm2	9.5 · 10−4 1/nm2
ρpoly(styrene) = ρsphere	1.3 · 10−4 1/nm2	9.2 · 10−4 1/nm2
ρiron oxide	6.7 · 10−4 1/nm2	40.6 · 10−4 1/nm2
ρshell	1.8 · 10−4 1/nm2	9.7 · 10−4 1/nm2

As iron oxide magnetite (Fe₃O₄) was assumed. For poly(styrene) (chemical formula (C₈H₈)_n) the volumetric mass density 1_g/cm³ was used for the calculation. The SLDs ρ_shell > ρ_sphere were used for the calculations of the PDDFs of the particles (Fig. 2).