Development of a relativistic atomic theory for accurate treatment of complex correlations
Date
2021
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Publisher
University of Delaware
Abstract
One of the central objectives of atomic, molecular and optical physics is describing complex correlations in atomic structure. There has been an increasing need for high quality high-precision atomic data and software in several scientific communities, including atomic, plasma and astrophysics. Having an accurate atomic theory is indispensable for experiments involving studies of fundamental interactions, astrophysics, atomic clocks, plasma science, quantum degenerate gases, quantum information, precision measurements, and others. The need for high-precision calculations of atomic properties of systems in the middle columns of the periodic table has become increasingly urgent due to its relevance in new experiments probing physics beyond the Standard Model. ☐ The ultimate goal of the work described in this thesis is to develop methods and codes to enable accurate computation of atomic properties of atoms and ions with complex electronic structure. We apply our newly developed code package for reliable calculations of atomic properties of systems that were not possible before. This includes calculations correlating all 60 electrons in the highly charged Ir17+ ion, calculations predicting clock transitions and analyzing systemic effects that could affect the accuracy and stability of Cf15+ and Cf17+ ions, calculations predicting the 3C3D line intensity ratio in Fe16+, calculations detecting the lowest lying odd parity atomic levels in neutral Ac, and calculating properties of negative ions La- and Bi-. The new code package will also be used to produce large volumes of atomic data for a new online portal being developed at the University of Delaware.
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Keywords
Atomic theory, High precision calculations, Computation of atomic properties