Bergeron, D.
, Cessna, J.
and Zimmerman, B.
(2017),
Two determinations of the Ge-68 half-life, Applied Radiation and Isotopes, [online], https://doi.org/10.1016/j.apradiso.2017.10.038
(Accessed January 9, 2026)
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Two determinations of the Ge-68 half-life
Published
Author(s)
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Abstract
In nuclear medicine, 68Ge is used to generate 68Ga for imaging by positron emission tomography (PET) and sealed sources containing 68Ge/68Ga in equilibrium have been adopted as long-lived calibration surrogates for the more common PET nuclide, 18F. We prepared several 68Ge sources for measurement on a NaI(Tl) well counter and a pressurized ionization chamber, following their decay for 110 weeks (≈ 2.8 half-lives). We determined values for the 68Ge half-life of T1/2 = 271.14(14) d and T1/2 = 271.07(12) d from the NaI(Tl) well counter and ionization chamber measurements, respectively. These are in accord with the current decay data evaluation project (DDEP) evaluation value of T1/2 = 270.95(26) d and we discuss the expected impact of our measurements on the evaluated half-life.Citation
Applied Radiation and Isotopes
Volume
134
Pub Type
Journals
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Keywords
Germanium-68, nuclear data, half-life, uncertainty, PET calibration, reentrant ionization chamber, NaI(Tl) well counter
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Created October 19, 2017, Updated November 10, 2018