Fiber-read radiation monitoring system using an optical fiber and red-emitting scintillator for ultra-high-dose conditions

摘要

We have developed a remote scintillation detector using a CCD spectrometer and a red-emitting scintillator coupled with a 20 m optical fiber for ultra-high-dose conditions. Gamma rays were detected with a conventional deep-red-emitting ruby scintillator and Cs2HfI6, which is a novel material with 700 nm red emission and a high light output. The scintillators were irradiated with gamma rays from a Co-60 source under an effective dose rate from similar to 0.002 to similar to 1 kSv h(-1). The integrated area of the Cs2HfI6 emission spectra was larger than that of the ruby, and good linearity of the Cs2HfI6 signal as a function of dose rate was confirmed.