Determination of the half-life of 161 Tb
Tb has potential applications in targeted radionuclide therapy and nuclear forensic science. However, the half-lives of Tb in previous studies show a discrepancy. In this study, Tb samples were produced by irradiating Gd O with thermal neutron flux. A series of procedures were applied to extract a p...
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| Published in | Applied radiation and isotopes Vol. 193; p. 110647 |
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| Main Authors | , , , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
England
01.03.2023
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| Subjects | |
| Online Access | Get full text |
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| Summary: | Tb has potential applications in targeted radionuclide therapy and nuclear forensic science. However, the half-lives of
Tb in previous studies show a discrepancy. In this study,
Tb samples were produced by irradiating
Gd
O
with thermal neutron flux. A series of procedures were applied to extract a pure
Tb solution and three solid samples were prepared. The half-life of
Tb has been measured with a high-purity germanium (HPGe) detector. The time-dependency of the
Tb activity was followed by assessing the count rate of their characteristic gamma-ray emissions at 48.9 keV and 74.6 keV over a period of 33-43 days. The experiment and uncertainty budget are discussed in detail. Different uncertainty propagation equations were applied for random uncertainties, medium-frequency deviations and potential systematic errors. The result for the
Tb half-life of 6.967 (11) d was determined by the weighted mean of half-lives from three samples, which confirms that the half-life is longer than the of the current evaluated half-life of 6.89 (2) d. From all available quoted experimental values, a recommended half-life of 6.934 (14) d was determined by the power-moderated method (PMM). Based on recent four published half-life values, a half-life of
Tb of 6.9582 (33) d was determined by the PMM analysis. |
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| ISSN: | 1872-9800 |