Standardisation of 90Sr, 63Ni and 55Fe by the 4πβ liquid scintillation spectrometry method with 3H-standard efficiency tracing

A. Ceccatelli, P. De Felice

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The 4πβ efficiency tracing liquid scintillation spectrometry method was applied with success, at ENEA, to the activity measurement of pure β- emitters (90Sr and63Ni) and electron-capturing nuclides (55Fe), using3H as tracer nuclide. The agreement of these measurements in comparison to other national metrology institutes was checked by means of two comparisons, carried out in 1996-1997. Furthermore a study of the stability of the prepared sources was performed and the dependence of the measured activity concentration on the quenching level was analysed. The radionuclides were standardised to a combined standard uncertainty of 0.14% for90Sr, 0.55% for63Ni and 1.18% for55Fe.
Original languageEnglish
Pages (from-to)85 - 92
Number of pages8
JournalApplied Radiation and Isotopes
Issue number1
Publication statusPublished - Jul 1999
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Radiation

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