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Multichannel quantum defect theory of strontium bound Rydberg states

Vaillant, CL; Jones, MPA; Potvliege, RM

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Authors

CL Vaillant



Abstract

Using the reactance matrix approach, we systematically develop new multichannel quantum defect theory (MQDT) models for the singlet and triplet S, P, D and F states of strontium below the first ionization limit, based on improved energy level measurements. The new models reveal additional insights into the character of doubly excited perturber states, and the improved energy level measurements for certain series allow fine structure to be resolved for those series' perturbers. Comparison between the predictions of the new models and those of previous empirical and ab initio studies reveals good agreement with most series; however, some discrepancies are highlighted. Using the MQDT wave functions derived from our models we calculate other observables such as Landé ${{g}_{J}}$-factors and radiative lifetimes. The analysis reveals the impact of perturbers on the Rydberg state properties of divalent atoms, highlighting the importance of including two-electron effects in the calculations of these properties. The work enables future investigations of properties such as Stark maps and long-range interactions of Rydberg states of strontium.

Citation

Vaillant, C., Jones, M., & Potvliege, R. (2014). Multichannel quantum defect theory of strontium bound Rydberg states. Journal of Physics B: Atomic, Molecular and Optical Physics, 47(15), Article 155001. https://doi.org/10.1088/0953-4075/47/15/155001

Journal Article Type Article
Acceptance Date Jun 12, 2014
Online Publication Date Jul 15, 2014
Publication Date Jan 1, 2014
Deposit Date Jul 8, 2014
Publicly Available Date Jul 16, 2014
Journal Journal of Physics B: Atomic, Molecular and Optical Physics
Print ISSN 0953-4075
Electronic ISSN 1361-6455
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 47
Issue 15
Article Number 155001
DOI https://doi.org/10.1088/0953-4075/47/15/155001
Keywords Perturbation theory, Oscillator strengths, Lifetimes, Transition moments, Fine and hyperfine structure.

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Accepted Journal Article (986 Kb)
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Copyright Statement
© 2014 IOP Publishing Ltd. This is an author-created, un-copyedited version of an article accepted for publication in Journal of physics B : atomic, molecular and optical physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at 10.1088/0953-4075/47/15/155001






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