Application of the sum-peak method to activity standardizations of 152 Eu sources in LNMRI (BR)
| Autor: | C.J. da Silva, Mam Araujo, P.A.L. da Cruz, C.F. Arcanjo, Ricardo Tadeu Lopes, A. L. Ferreira Filho, José Ubiratan Delgado, R.W.R.V. Da Silva, R. Poledna |
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| Rok vydání: | 2018 |
| Předmět: |
Radiation
Electron capture Astrophysics::High Energy Astrophysical Phenomena Analytical chemistry Mass spectrometry 01 natural sciences Coincidence 030218 nuclear medicine & medical imaging Computational physics 010309 optics 03 medical and health sciences Matrix (mathematics) 0302 clinical medicine 0103 physical sciences Ionization chamber Calibration Coincidence counting Counting rate Mathematics |
| Zdroj: | Applied Radiation and Isotopes. 134:340-350 |
| ISSN: | 0969-8043 |
| Popis: | The sum-peak method, an absolute measurement technique that uses coincidence counting and γ-ray spectrometry, was applied to activity standardization of 152Eu sources. The decay branch used was that of 152Sm, as it is almost entirely electron capture and exhibits X-rays with a high probability of coincidence with the 121.8 keV gamma rays, as evidenced by the matrix technique used for complex decay schemes, a method for deriving counting rate equations describing coincidence summing of gamma and X-rays. The result was compared with the calibration performed by ionization chamber traceable to BIPM. The results presented uncertainty values of 0.50% (k = 1). |
| Databáze: | OpenAIRE |
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