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The radionuclide (68)Ga is one of the few positron emitters that can be prepared in-house without the use of a cyclotron. It disintegrates to the ground state of (68)Zn partially by positron emission (89.1%) with a maximum energy of 1899.1 keV, and partially by electron capture (10.9%). This nuclide has been standardized in the frame of a cooperation project between the Radionuclide Metrology laboratories from CIEMAT (Spain) and CNEA (Argentina). Measurements involved several techniques: 4πβ-γ coincidences, integral gamma counting and Liquid Scintillation Counting using the triple to double coincidence ratio and the CIEMAT/NIST methods. Given the short half-life of the radionuclide assayed, a direct comparison between results from both laboratories was excluded and a comparison of experimental efficiencies of similar NaI detectors was used instead. Copyright © 2012 Elsevier Ltd. All rights reserved.

Citation

Miguel Roteta, Virginia Peyres, Leonor Rodríguez Barquero, Eduardo García-Toraño, Pablo Arenillas, Christian Balpardo, Darío Rodrígues, Roberto Llovera. Standardization of Ga-68 by coincidence measurements, liquid scintillation counting and 4πγ counting. Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine. 2012 Sep;70(9):2006-11

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PMID: 22421395

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