| 摘要 |
PROBLEM TO BE SOLVED: To enable a radiation-measuring apparatus, for detectingγ-rays to measure in a low energy region by reducing cutting energy. SOLUTION: Output pulses from a radiation detector 20 and a plurality of radiation detectors 22 are bound and are counted at an OR circuit 24. The radiation detectors 22 detect charges generated by radioactive rays in a radiation detection semiconductor element 42, without being converted to a light at a scintillator, while conversion into the light at the scintillator is interposed in the radiation detector 20. A lower cut level can be set to the radiation detectors 22 than to the radiation detector 20 because of this difference of methods of detecting the radioactive rays. The measuring apparatus has a measuring range extended towards the low energy side.
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