| 摘要 |
PURPOSE:To determine the radioactivity within a storage drum can with one radiation detecting system by measuring the energy spectra of radioactive rays incedent through a collimator of the front of a radiation detector from an inspected object with a signal processor. CONSTITUTION:gamma-rays emitted from within a drum can 1 are measured by a radiation detector 2. Here, the output of the detector 2 becomes signals amplified by a preamplifier 6 and the signals are input to a linear amplifier 7. Next, the signals are made the waveform-shaping and amplified by the amplifier 7, the signals suited for the gamma-ray energy spectrum measurement are obtained, the signals are input to a multichannel analyzer 8, and the energy spectra caused by the gamma-rays emitted from within the drum can 1 and passing through here, are here found at every section of the drum can. Then, dead time signals of the analyzer 8 are input to a multichannel scanning device 9, the rotational position informations of the drum can 1 are found in an encoder 11, and the dead time of the analyzer 8 is measured in the device 9. The weight of the drum can 1 is measured by a gravimeter 10.
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