Journal article
First measurement of Lyman alpha x-ray lines in hydrogen-like vanadium: Results and implications for precision wavelength metrology and tests of QED
JD Gillaspy, CT Chantler, D Paterson, LT Hudson, FG Serpa, E Takcs
Journal of Physics B Atomic Molecular and Optical Physics | Published : 2010
Abstract
The first measurement of hydrogen-like vanadium x-ray Lyman alpha transitions has been made. The measurement was made on an absolute scale, fully independent of atomic structure calculations. Sufficient signal was obtained to reduce the statistical uncertainty to a small fraction of the total uncertainty budget. Potential sources of systematic error due to Doppler shifts were eliminated by performing the measurement on trapped ions. The energies for Ly α1 (1s-2p3/2) and Ly α2 (1s-2p 1/2) are found to be 5443.95(25) eV and 5431.10(25) eV, respectively. These results are within approximately 1.5 σ (experimental) of the theoretical values 5443.63 eV and 5430.70 eV. The results are discussed in ..
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Funding Acknowledgements
We thank Peter Mohr, Paul Indelicato, Albert Henins and Kevin Coakley for useful discussions, Vladimir Yerokhin for sharing his work in advance of publication and Mark Kinnane for the schematic diagram on the right side of figure 1 ( from his doctoral dissertation at the University of Melbourne). The present work was supported by the Australian Research Council.