ZnS(Ag) scintillation detector

Details ZnS(Ag) scintillation detector ZnS(Ag) scintillation detector

2008-05-20

2008-05-20

Porta, David P. (Department: 2884)

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

C250S370020, C250S370110

Reexamination Certificate

active

07375336

ABSTRACT:
A ZnS (Ag) scintillation detector comprises a ZnS (Ag) scintillators layer22which is excited by incident α-rays and emits a scintillator light, a photomultiplier tube16which converts the scintillator light into an electric pulse signal, and a counting rate meter34which counts the obtained pulse signal. The scintillator layer has a thickness which is not less than a range of α-rays from α-ray emitting nuclides (natural radioactive nuclides) to be separated, which enables energy absorption of α-rays from the α-ray emitting nuclides to be separated to entirely occur in the scintillator layer, and which enables light shielding of the scintillator light generated in the scintillator layer by the scintillator layer itself to be neglected. A pulse height discrimination circuit32is further provided in a preceding stage of the counting rate meter. Thereby, the effect of the natural radioactive nuclides can be reduced and the contamination control can be efficiently and smoothly performed.

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