Absolute photoionization cross-section measurements of the Kr I isoelectronic sequence
- NCPST and The School of Physical Sciences, Dublin City University, Dublin (Ireland)
- Institute of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C (Denmark)
- LIXAM, Universite Paris Sud, Orsay 91405 (France)
- School of Mathematics and Physics, Queen's University of Belfast, Belfast BT7 1NN (United Kingdom)
- Department of Physics, University College Cork, Cork (Ireland)
- Daresbury Laboratory, Warrington WA4 4AD (United Kingdom)
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{sup +} and Sr{sup 2+}. Many 4p{yields}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{sup +} and Sr{sup 2+} 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.
- OSTI ID:
- 20982331
- Journal Information:
- Physical Review. A, Vol. 75, Issue 3; Other Information: DOI: 10.1103/PhysRevA.75.032711; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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