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Absolute photoionization cross-section measurements of the Kr I isoelectronic sequence

Kilbane, Deirdre and Folkmann, F. and Bizau, J.-M. and Banahan, Caroline and Scully, S. and Kjeldsen, H. and van Kampen, Paul and Mansfield, M. and Costello, John T. and West, J. (2007) Absolute photoionization cross-section measurements of the Kr I isoelectronic sequence. Physical Review A, 75 (3). 032711-1. ISSN 1050-2947

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Abstract

Photoionization spectra have been recorded in the 4s, 4p, and 3d resonance regions for the Kr I isoelectronic sequence using both the dual laser produced plasma (DLP) technique (at DCU) to produce photoabsorption spectra, and the merged ion beam and synchrotron radiation technique (at ASTRID) to measure absolute photoionization cross sections. Profile parameters are compared for the 4s-np resonances of Rb+ and Sr2+. Many 4p→ns, md transitions are identified with the aid of Hartree-Fock calculations, and consistent quantum defects are observed for the various ns and md Rydberg series. Absolute single and double photoionization cross sections recorded in the 3d region for Rb+ and Sr2+ ions show preferential decay via double photoionization. This is only the second report to our knowledge where both the DLP technique and the merged-beam technique have been used simultaneously to record photoionization spectra, and the advantages of both techniques (i.e., better resolution in the case of DLP and values for absolute photoionization cross sections in the case of the merged-beam technique) are highlighted.

Item Type:Article (Published)
Refereed:Yes
Subjects:Physical Sciences > Physics
DCU Faculties and Centres:Research Initiatives and Centres > National Centre for Plasma Science and Technology (NCPST)
DCU Faculties and Schools > Faculty of Science and Health > School of Physical Sciences
Publisher:The American Physical Society
Official URL:http://dx.doi.org/10.1103/PhysRevA.75.032711
Copyright Information:© 2007 The American Physical Society
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:Irish Research Council for Science Engineering and Technology, Science Foundation Ireland, Higher Education Authority
ID Code:15653
Deposited On:10 Aug 2010 17:17 by DORAS Administrator. Last Modified 10 Aug 2010 17:17

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