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Photoabsorption and photoion spectroscopy of atomic uranium in the region of 6p and 5d excitations

van Kampen, Paul and Gerth, Ch. and Martins, M. and Carroll, P. and Hirsch, John and Kennedy, Eugene T. and Meighan, Oonagh and Mosnier, Jean-Paul and Zimmermann, P. and Costello, John T. (2000) Photoabsorption and photoion spectroscopy of atomic uranium in the region of 6p and 5d excitations. Physical Review A, 61 (6). 062706-1-062706-7. ISSN 1050-2947

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Abstract

The photoabsorption process in atomic uranium has been investigated experimentally and theoretically in the 15–150-eV region. Using the dual laser plasma technique, the 6p photoabsorption spectrum has been recorded while for the first time the 5d region has been remeasured photoelectrically using both photoabsorption and photoion spectroscopy. Interpretation of the photoabsorption spectra is supported by Hartree-Fock calculations which take into account spin-flip decay and the interaction of many discrete states with many continua. The 6p spectrum is entirely dominated by spin-orbit split 6p⃗6d transitions. The 5d-subshell photoabsorption is shown to consist predominantly of discrete 5d⃗5f excitations; here the electrostatic and spin-orbit interactions are comparable in strength.

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.61.062706
Copyright Information:© 2000 The American Physical Society
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:Enterprise Ireland
ID Code:15609
Deposited On:05 Aug 2010 16:16 by DORAS Administrator. Last Modified 05 Aug 2010 16:16

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