Estimation of radioactive activity by gamma spectroscopy
DOI:
https://doi.org/10.32685/2590-7468/invapnuclear.7.2023.667Keywords:
Gamma spectroscopy, Gamma spectroscopy, decay chain, radioactive activity, absolute efficiency., radioactive activity, absolute efficiency
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Copyright (c) 2023 Servicio Geológico Colombiano
This work is licensed under a Creative Commons Attribution 4.0 International License.
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Abstract
Radioactive sources of isotopes 22Na, 137Cs, 60Co, 133Ba and decay chains of Th and U are analyzed by means of gamma spectroscopy. The instrument used, a cylindrical NaI(Tl) scintillator from Mirion Technologies (Canberra) with dimensions of 2 × 2, is characterized by its calibration and absolute efficiency. The peak energies of the gamma spectra obtained are identified and related to corresponding isotopes and matter-radiation interactions according to nuclear and atomic databases. From these data, spectroscopic methods are implemented to compute radioactive activities for each source.
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