کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8171878 | 1526325 | 2015 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
18F Half-life measurement using 2-γ coincidence method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
ابزار دقیق
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
The accuracy of the half-life measurement of short-lived radioisotopes such as positron-emitting 18F (Ï1/2â100min) 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 801, 21 November 2015, Pages 7-10
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 801, 21 November 2015, Pages 7-10
نویسندگان
Y.S. Kang, J.K. Ahn, S.H. Kim, J.I. Byun, J.B. Han, K.B. Lee,