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We synthesized a fast scintillation material based on a ternary halide crystal, CsCaCl3, which is known to exhibit Auger-free luminescence (AFL) under core-level excitation. We characterized its luminescence properties using vacuum ultraviolet (VUV) light for excitation. We observed a broad AFL band centered at approximately 300nm for the core hole excitation, with a decay time of 2.3ns. In addition...