| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiation irradiation determining method and a radiation irradiation determining system, which reduce work load on experimenter, and can objectively and precisely determine the presence or absence of radiation irradiation onto a sample, such as a food, a natural medicine or the like. SOLUTION: In the radiation irradiation determining system 100, the food 101 is irradiated with an excitation light from an LED 102c controlled by a pulse-generating device 104; and the light emitted from the food 101 being irradiated with the excitation light is detected by a photomultiplier tube 102e via a filter 102d; the intensity of the emitted light that is detected is measured by a pulse counter 110 with time via a photon-counting unit 108, and the variation in the light intensity is calculated, based on the light intensity measured with time; and the presence or absence of the radiation irradiation onto the food 101 is determined, based on the calculated variation, by using an radiation irradiation determining device 112. COPYRIGHT: (C)2007,JPO&INPIT
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