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Title: Forbidden optical transition in Ti-like Xe, Ba, and Ir

We present measurements of the (3d{sup 4}){sup 5}D{sub 2}−{sup 5}D{sub 3} transitions in the Ti-like ions Xe{sup 32+}, Ba{sup 34+}, and Ir{sup 55+} produced and trapped in the Heidelberg electron beam ion trap. The obtained wavelengths have a precision at the few ppm-level and are thereby the most precise measurements of these transitions up to date. For Z=60−75 semi-empirical calculations have shown excellent agreement, however our measurements combined with data from other works shows that outside this range predictions quickly deviate. The value obtained for Ir{sup 55+} 357.434(2) nm confirms the linear mismatch to ab initio calculations for Z > 70, as hypothesized in Utter et al., Phys. Rev. A 67, 012508 (2003)
Authors:
; ; ;  [1] ;  [2] ;  [3]
  1. Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg (Germany)
  2. Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116, Braunschweig (Germany)
  3. TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada and Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, V6T 1Z1 (Canada)
Publication Date:
OSTI Identifier:
22390838
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1640; Journal Issue: 1; Conference: 12. International Symposium on Electron Beam Ion Sources and Traps, East Lansing, MI (United States), 18-21 May 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ACCURACY; BARIUM IONS; ELECTRON BEAMS; ENERGY-LEVEL TRANSITIONS; IRIDIUM IONS; MULTICHARGED IONS; TRAPPING; TRAPS; XENON IONS