Magnetic susceptibility of actinide() cations: an experimental and theoretical study

In a previous paper, the influence of radioactive decay (α and β − ) on magnetic susceptibility measurements by the Evans method has been demonstrated by the study of two americium isotopes. To characterize more accurately this phenomenon and particularly its influence on the Curie law, a new study...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2016-03, Vol.18 (9), p.6515-6525
Main Authors: Autillo, Matthieu, Guerin, Laetitia, Bolvin, Hélène, Moisy, Philippe, Berthon, Claude
Format: Article
Language:English
Subjects:
Americium isotopes
Cations
Chemical Sciences
Constants
Magnetic permeability
Magnetic susceptibility
or physical chemistry
Radioactivity
Solvation
Temperature dependence
Theoretical and
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Summary:In a previous paper, the influence of radioactive decay (α and β − ) on magnetic susceptibility measurements by the Evans method has been demonstrated by the study of two americium isotopes. To characterize more accurately this phenomenon and particularly its influence on the Curie law, a new study has been performed on two uranium isotopes ( 238 U and 233 U) and on tritiated water ( 3 H 2 O). The results on the influence of α emissions have established a relationship between changes in the temperature dependence and the radioactivity in solution. Regarding the β − emissions, less influence was observed while no temperature dependence linked to this kind of radioactive emission could be identified. Once magnetic susceptibility measurements of actinide( iii ) cations were corrected from radioactivity effects, methods of quantum chemistry have been used on free ions and aquo complexes to calculate the electronic structure explaining the magnetic properties of Pu( iii ), Am( iii ) and Cm( iii ). The ligand field effect on the magnetic behavior (the Curie constant and temperature-independent susceptibilities) was analyzed by considering different solvation environments. Radioactive decay on magnetic susceptibility measurements by the Evans's method has been characterized on two uranium isotopes and on tritiated water. Quantum chemistry calculations have been performed to explain Pu( iii ), Am( iii ) and Cm( iii ) magnetic susceptibilities corrected from the radioactivity effects.
ISSN:1463-9076
1463-9084
DOI:10.1039/c5cp07456h