赤色・近赤外発光シンチレーション結晶の新展開

抄録

  Real dose monitors under the high dose-rate condition are required to remove the debris in the Fukushima Daiichi Nuclear Power Plant as the decommissioning step, and I have proposed a dose-rate monitor consisting of a scintillator, optical fiber and photo detector. To realize such monitor, scintillation materials are required to have the long-emission-wavelength (550 - 1000 nm) and high light output. From this reason, several novel materials such as Cs₂HfI₆ and Rb₂HfI₆ for gamma-ray detection have been developed, and Li₂HfBr₆ had sensitive to both gamma ray and neutrons. These scintillators had an emission wavelengths of 600 to 750 nm, and I review the detail of such red and infrared emitting scintillator.