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- W1415532043 abstract "The accuracy of the half-life measurement of short-lived radioisotopes such as positron-emitting 18F (τ1/2≈100min) is limited mainly by inaccuracies in the detector counting statistics. Gamma-ray measurement with a high-activity 18F source requires counting-loss corrections to compensate for random summing effects and the detector׳s dead time. In this study, we measure the half-life of 18F with two 511-keV γ-rays using two high-purity germanium (HPGe) detectors. The counting-loss corrections are performed via two approaches to address the problems of random coincidence summing and dead time: a half-life measurement with a 22Na source and a Geant4 simulation of the detector response. Variations in the full-width at half maximum (FWHM) of the 511-keV peak are found to show good correlation with the random summing effect. The half-life of 18F is estimated as 109.73±0.14min." @default.
- W1415532043 created "2016-06-24" @default.
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- W1415532043 date "2015-11-01" @default.
- W1415532043 modified "2023-10-14" @default.
- W1415532043 title "18F Half-life measurement using 2-γ coincidence method" @default.
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- W1415532043 doi "https://doi.org/10.1016/j.nima.2015.08.025" @default.
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