High-precision ab initio calculations of the spectrum of Lr+

E. V. Kahl, J. C. Berengut, M. Laatiaoui, E. Eliav, A. Borschevsky

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Abstract

The planned measurement of optical resonances in singly ionized lawrencium (Z=103) requires accurate theoretical predictions to narrow the search window. We present high-precision, ab initio calculations of the electronic spectra of Lr+ and its lighter homologue lutetium (Z=71). We have employed the state-of-the-art relativistic Fock space coupled cluster approach as well as the configuration interaction with many-body perturbation theory (CI+MBPT) method to calculate atomic energy levels, g factors, and transition amplitudes and branching ratios. Our calculations are in close agreement with experimentally measured energy levels and transition strengths for the homologue Lu+, and are well converged for Lr+, where we expect a similar level of accuracy. These results present large-scale, systematic calculations of Lr+ and will serve to guide future experimental studies of this ion.

Original languageEnglish
Article number062505
JournalPhysical Review A
Volume100
Issue number6
DOIs
StatePublished - 9 Dec 2019

Funding

FundersFunder number
Australian Government Research Training Program
European Union's Horizon 2020
Horizon 2020 Framework Programme819957
European Research Council
Australian Research Council
University of New South Wales

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