On the Chemically Induced Decay Constant Variation of Tc-99 m
Open Access
- 1 September 1978
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung A
- Vol. 33 (9) , 1050-1055
- https://doi.org/10.1515/zna-1978-0910
Abstract
The chemical induced decay constant variations for some complex compounds of Tc-99 m were measured by means of a semidifferential approach, using the scintillation technique. The results are λ(TcO4 -) - λ(TcCl6 2-) = (2.52±0.30) · 10-3 λ, λ(TcCl6 2-) - λ(TcBr6 2-) = (-0.02±0.20) · 10-3 λ, λ(TcCl6 2-) - λ (TcI6 2-) = (0.78 ± 0.41) · 10-3 λ, λ(TcO4 -) - λ(TcI6 2-) = (3.30 ± 0.30) · 10-3 λ, λ(TcO4 -) - λ(TcBr6 2-) = (2.50 ± 0.41) · 10-3 λ. Theoretical estimations by means of atomic structure calculations show that TcO4 - should have the greatest decay constant among the compounds investigated, in accordance with the measured values, and that the decay constants of the octahedral complexes should follow the spectrochemical series, partly confirmed by the experiments.Keywords
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