Patent ID: 7333585

Claim:
A device for measuring radiation comprising: a radiation detector configured to generate an analog signal containing pulse components corresponding to a dosage of an inputted radiation; an n-th moment calculation unit configured to calculate an average value of the n-th power values of pulse heights within a time width as an n-th moment value based on the analog signal outputted from the radiation detector, where n is an integer of not less than two, and where the pulse heights correspond to the pulse components included in the analog signal; a pulse counter configured to count a number of pulse components based on the analog signal outputted from the radiation detector; an average energy calculation unit configured to calculate an average energy of the radiation based on a ratio of the n-th moment value calculated by the n-th moment calculation unit to the number of the pulse components counted by the pulse counter; and a dosage evaluation unit configured to calculate a dosage equivalent to the radiation based on the average energy of the radiation outputted from the average energy calculation unit and the ratio of the n-th moment value to the number of the pulses.