Precision spectroscopy of the $3s-3p$ fine-structure doublet in $Mg^+$

V. Batteiger, S. Knünz, M. Herrmann, G. Saathoff, H. A. Schüssler, B. Bernhardt, T. Wilken, R. Holzwarth, T. W. Hänsch, Th. Udem

Research output: Contribution to journalArticlepeer-review


We apply a recently demonstrated method for precision spectroscopy on strong transitions in trapped ions to measure both fine-structure components of the 3s−3p transition in 24Mg+ and 26Mg+. We deduce absolute frequency reference data for transition frequencies, isotope shifts, and fine-structure splittings that in particular are useful for comparison with quasar absorption spectra, which test possible space-time variations of the fine-structure constant. The measurement accuracy improves previous literature values, when existing, by more than two orders of magnitude.
Original languageEnglish
Pages (from-to)022503
Number of pages8
JournalPhysical Review B
Publication statusPublished - 1 Aug 2009
Externally publishedYes

Fields of Expertise

  • Advanced Materials Science

Cite this