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Resonances in a positron-lithium (e(+)-Li) system
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
Number of Authors: 2
2016 (English)In: Physical Review A, ISSN 2469-9926, Vol. 93, no 5, 052707Article in journal (Refereed) Published
Abstract [en]

The method of complex scaling is used to calculate S- and P-wave resonance energies and widths below the Li(3s, 3p, 4s, 4p) excitation thresholds and positronium n = 2 formation threshold in the positron-lithium system. We use two different types of model potentials to determine the interaction between the core and the valence electron. Explicitly correlated Gaussian basis functions are used to represent the correlation effects between the valence electron, the positron, and the Li+ core. A dipole series of resonances are found under the positronium n = 2 threshold. Furthermore, these resonances are found to agree well with an analytically derived scaling law. The present results are compared with those in the literature.

Place, publisher, year, edition, pages
2016. Vol. 93, no 5, 052707
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-131492DOI: 10.1103/PhysRevA.93.052707ISI: 000376239900008OAI: oai:DiVA.org:su-131492DiVA: diva2:940781
Available from: 2016-06-21 Created: 2016-06-20 Last updated: 2016-06-21Bibliographically approved

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Umair, MuhammadJonsell, Svante
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