TlCl:Be,I: a high sensitivity scintillation and Cherenkov radiator for TOF-PET.

The material requirements for gamma-ray detectors for medical imaging applications are multi-fold and sensitivity is often overlooked. High effective atomic number (Z) Cherenkov radiators have raised the attention in the community due to their potential for harvesting prompt photons. A material with one of the highest Z and thus short gamma-ray attenuation length is thallium chloride (TlCl).