Scintillation Properties of a Non-Doped ${\rm Ca}_3{\rm TaGa}_3{\rm Si}_2{\rm O}_{14}$ Crystal

In order to search for a new scintillation material consisting of tantalum (Ta) with a high atomic number of 73, we have investigated scintillation properties of langasite type crystal containing Ta. Non-doped Ca₃TaGa₃Si₂O₁₄ (CTGS), which is well known as a piezoelectric material, was grown by the Czochralski method. Radio-luminescence spectrum of this crystal peaked around 340 nm. Its light output was approximately 1,200 photons/MeV. This crystal is expected to be a scintillation host material.