Abstract

The effects of optical filters on rise times of output signals from a ZnS(Ag) scintillator have been examined, and phoswich detectors applying them were devised for more effective simultaneous counting of α and β (including γ) rays emitted from actinides. The optical sharpcut filters made the rise times slower and optical bandpass filters made them faster. In this paper, two improved phoswich detectors, ZnS(Ag)/sharpcut-filter/NaI(Tl) and ZnS(Ag)/bandpass-filter/CsI(Tl), are demonstrated.

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