Radiation monitoring device

A radiation monitor device comprising:

• a radiation detection unit including a phosphor that emits light by incident radiation;
• a photodetector that converts a single photon or a photon group having a plurality of the single photons generated by the radiation detection unit into an electric pulse signal;
• a signal discrimination circuit coupled to the photodetector;
• a dose rate calculation circuit coupled to the signal discrimination circuit;
• and
• an application energy calculation circuit coupled to the signal discrimination circuit,
• wherein the phosphor emits light based on a plurality of light emission phenomena having different decay time constants, and
• wherein the signal discrimination circuit discriminates the electric pulse signal output from the photodetector by determining whether the electric pulse signal is of a signal of a photon group or of a single photon,
• wherein the dose rate calculation circuit calculates a dose rate of the radiation based on a count rate of the discriminated electric pulse signal, and
• wherein the application energy calculation circuit calculates an application energy of the radiation based on a peak value of the discriminated electric pulse signal.