Growth and Scintillation Properties of a New Red-Emitting Scintillator Rb₂HfI₆ for the Fiber-Reading Radiation Monitor

A new red-emitting halide scintillator Rb2HfI6 was developed using the vertical Bridgman furnace and quartz ampoule. Under X-ray irradiation, Rb2HfI6 had a broad emission band of around 725 nm. The light output and energy resolution were determined to be ~40000 photons/MeV and ~7.4% (full-width at half-maximum at 662 keV), respectively. Since red photons are transmitted with smaller losses than bl...