Activity determination of 18F using liquid scintillation beta-efficiency extrapolation and non-extrapolation methods.
Appl Radiat Isot
; 160: 109070, 2020 Jun.
Article
in En
| MEDLINE
| ID: mdl-32351212
ABSTRACT
The absolute activity of 18F was determined using 4πß-γ liquid scintillation coincidence counting using beta-efficiency extrapolation. An ionization chamber factor was determined for use during a SIRTI comparison, for which results are presented. A non-extrapolation method based on a detection efficiency analysis was also employed using an adaptation of the double-phototube coincidence efficiency for a threshold above the second monopeak. Results and uncertainty budgets for the two methods are presented and discussed.
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MEDLINE
Language:
En
Year:
2020
Type:
Article