Abstract
Two intrinsic scintillators TlMgCl3 and TlCaI3 with excellent energy resolution and fast scintillation decay are presented. Crack-free transparent crystals were successfully grown by the Bridgman method. The scintillation light yields of TlMgCl3 and TlCaI3 are approximately 30,600ph/MeV and 42,200ph/MeV, respectively. Their energy resolutions at 662keV are 3.7% for TlMgCl3 and 6.2% for TlCaI3. The scintillation decay times of TlMgCl3 are 46ns, 166ns, and 449ns. The scintillation decay times of TlCaI3 are 62ns, 200ns, and 1.44μs. Under X-ray irradiation, the emission of TlMgCl3 is between 300nm and 540nm with the peak at 409nm. TlCaI3 has a broad emission band between 300nm and 750nm. Due to their excellent scintillation properties, these two scintillators can be developed for gamma-ray detection. Additionally, TlMgCl3 is non-hygroscopic.
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