| 摘要 |
PURPOSE:To make measurement upon discriminating perfectly alpha and beta(gamma) rays of the gross at the same time with one run of measuring using a waveform discriminating method. CONSTITUTION:A sensor is equipped with composite scintillator consisting of a double combination of ZnS (Ag) scintillator, plastic having a gored short rising (falling) time, stilbene, and BGO or NaI (Tl) scintillator, in which the ZnS (Ag) scintillator is first arranged for a ray source, and then plastic, stilnbene, and BGO or NaI (Tl) scintillator are arranged. Another sensor is fitted with a composite scintillator consisting of a treble combination of ZnS (Ag) scintillator, plastic or stilnbene having a good short rising (falling) time, and BGO or NaI (Tl) scintillator, in which the ZnS (Ag) scintillator is first arranged for a ray source, and then plastic or stilbene is arranged, and finally BGO or NaI (Tl) is arranged.
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