Non-destructive testing of mechanical components achieved by hybrid copper–iodide cluster†

We synthesized a Cu₄I₄(3-picoline)₄ cluster scintillator with high X-ray attenuation and a 89.25% photoluminescence quantum yield. In situ fabrication yielded screens showing a high light yield (60 617 photons per MeV), low detection limit (0.91 μGy_air s⁻¹), and exceptional resolution (13 lp per mm). Non-destructive testing ability was demonstrated by imaging from plastic to metal.