Activity measurement of (68)Ge-(68)Ga by use of 4π(ß(+)+γ) integral counting method.
Appl Radiat Isot
; 109: 325-329, 2016 Mar.
Article
em En
| MEDLINE
| ID: mdl-26701660
ABSTRACT
A 4π(ß(+)+γ) integral counting method using 4πß-4πγ detector configuration composed of a large well type NaI(Tl) scintillation detector and stacked plastic scintillators positioned in the center of the well and coupled with a slender PMT was adopted for activity measurement of (68)Ge-(68)Ga. Several source preparation schemes were studied to reduce the activity loss due to volatility. The possible contribution of EC events were rejected with pulse-height discrimination. Owing to the high counting efficiencies in both channels and the multiplicity of photons and ß-particles emitted, the 4π(ß(+)+γ) integral counting system gives a count rate very nearly equal to the positron emission rate. The activity can be determined simply from this value divided by the positron emission branching ratio. The remaining overall inefficiency was evaluated by the EGS5 code.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Appl Radiat Isot
Assunto da revista:
MEDICINA NUCLEAR
/
SAUDE AMBIENTAL
Ano de publicação:
2016
Tipo de documento:
Article