Communication: Relativistic Fock-space coupled cluster study of small building blocks of larger uranium complexes
2014; American Institute of Physics; Volume: 141; Issue: 4 Linguagem: Inglês
10.1063/1.4891801
ISSN1520-9032
AutoresPaweł Tecmer, André Severo Pereira Gomes, Stefan Knecht, Lucas Visscher,
Tópico(s)Radioactive contamination and transfer
ResumoWe present a study of the electronic structure of the [UO2](+), [UO2](2 +), [UO2](3 +), NUO, [NUO](+), [NUO](2 +), [NUN](-), NUN, and [NUN](+) molecules with the intermediate Hamiltonian Fock-space coupled cluster method. The accuracy of mean-field approaches based on the eXact-2-Component Hamiltonian to incorporate spin-orbit coupling and Gaunt interactions are compared to results obtained with the Dirac-Coulomb Hamiltonian. Furthermore, we assess the reliability of calculations employing approximate density functionals in describing electronic spectra and quantities useful in rationalizing Uranium (VI) species reactivity (hardness, electronegativity, and electrophilicity).
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