${\rm Eu}$ - or ${\rm Ce}$ -Doped Barium Halide Scintillators for X-Ray and $\gamma$ -Ray Detections

We report on the scintillation properties of undoped, Eu-, Ce-, and Ce/K-codoped BaCl2, BaBr2, and BaI2 single crystals, which were investigated by X-ray excited luminescence, pulse height, and scintillation decay spectroscopy.