Fig. 1: Light scattering in different scintillator systems.
From: Scattering-free lanthanide-ionic liquid scintillators for high-resolution and adaptive X-ray imaging

Solid scintillators, composed of micron-sized particles, suffer from severe light scattering, limiting scintillation light transmission. Solution mixture scintillators, with solute aggregation in the range of > 100 nm, exhibit moderate scattering, reducing optical clarity. In contrast, intrinsic liquid scintillators, with molecular-level homogeneity (< 1 nm particle size), minimize light scattering, enabling superior light penetration and enhanced X-ray imaging performance.