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"Standardization of 18F by digital beta(LS)-gamma coincidence counting"
D. Rodrigues, C. Balpardo, P. Cassette, P. Arenillas, M.E. Capoulat, G. Cerutti and E. García-Toraño
Proc. of the "International Conference on Advances in Liquid Scintillation Spectrometry" (LSC 2010), Paris, France, September 6-10, 2010. Ed. P. Cassette
LSC 2010: Advances in Liquid Scintillation Spectrometry, 1st. edition, Radiocarbon, Tucson, Arizona (2011) 359-365
ISBN: 978-096383147-7
The nuclide 18F disintegrates to 18O by beta+ emission (96.86%) and electron capture (3.14%) with a half-life of 1.8288 h. It is widely used in nuclear medicine for positron emission tomography (PET). Because of its short half-life this nuclide requires the development of fast measuring methods to be standardized. The combination of LSC methods with digital techniques proves to be a good alternative to get low uncertainties for this, and other, short lived nuclides. A radioactive solution of 18F has been standardized by coincidence counting with a LSC, using the logical sum of double coincidences in a TDCR array and a NaI scintillation detector. The results show good consistency with other techniques like 4Pi gamma and LSC.
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