Solid scintillator 'Ready Cap' for measurement with a liquid scintillation counter. Spectra and counting efficiencies for 15 different radionuclides

Autor:	Kenichi Ijiri, Naotake Morikawa, Norio Nogawa, Susumu Osaki, Aiko Nakamura, Masashi Endo, Shoko Tsuda
Rok vydání:	1990
Předmět:	Radioisotopes Radionuclide Scintillation Radiation Physics::Instrumentation and Detectors Chemistry Liquid scintillation counting Counting efficiency Radiochemistry Scintillator Evaluation Studies as Topic Scintillation counter Scintillation Counting Nuclide Waste disposal
Zdroj:	RADIOISOTOPES. 39:400-403
ISSN:	1884-4111 0033-8303
DOI:	10.3769/radioisotopes.39.9_400
Popis:	"Ready Cap", a small plastic container coated with solid scintillator has recently been introduced (Beckman Instruments, Inc.). Pulse height spectra and counting efficiencies obtained with a liquid scintillator and Ready Cap using a liquid scintillator counter were compared for 15 different radionuclides. For radionuclides emitting low-energy beta-rays or characteristic X-rays, the spectra for Ready Cap shifted toward the higher energy side compared with the spectra for the liquid scintillator. This tendency was reversed for the nuclides emitting higher-energy beta-radiations (36Cl and 32P). Generally, counting efficiencies both in Ready Cap and in liquid scintillator increased with increase in the energy of beta- or X-rays. For some nuclides, Ready Cap gave higher counting efficiencies and for others it gave lower values than in the liquid scintillator. However, the differences were not large within each nuclide. The use of Ready Cap is recommended for measurements of radionuclides when liquid scintillation cocktails have no means of waste disposal under the present Japanese radioisotope regulation.
Databáze:	OpenAIRE
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