Publication

Identification of the Predicted 5(s)-4(f) Level Crossing Optical Lines with Applications to Metrology and Searches for the Variation of Fundamental Constants

Windberger, A., Lopez-Urrutia, J. R. C., Bekker, H., Oreshkina, N. S., Berengut, J. C., Bock, V., Borschevsky, A., Dzuba, V. A., Eliav, E., Harman, Z., Kaldor, U., Kaul, S., Safronova, U. I., Flambaum, V. V., Keitel, C. H., Schmidt, P. O., Ullrich, J. & Versolato, O. O., 16-Apr-2015, In : Physical Review Letters. 114, 15, 6 p., 150801.

Research output: Contribution to journalArticleAcademicpeer-review

  • A. Windberger
  • J. R. Crespo Lopez-Urrutia
  • H. Bekker
  • N. S. Oreshkina
  • J. C. Berengut
  • V. Bock
  • A. Borschevsky
  • V. A. Dzuba
  • E. Eliav
  • Z. Harman
  • U. Kaldor
  • S. Kaul
  • U. I. Safronova
  • V. V. Flambaum
  • C. H. Keitel
  • P. O. Schmidt
  • J. Ullrich
  • O. O. Versolato

We measure optical spectra of Nd-like W, Re, Os, Ir, and Pt ions of particular interest for studies of a possibly varying fine-structure constant. Exploiting characteristic energy scalings we identify the strongest lines, confirm the predicted 5(s)-4(f) level crossing, and benchmark advanced calculations. We infer two possible values for optical M2/E3 and E1 transitions in Ir17+ that have the highest predicted sensitivity to a variation of the fine-structure constant among stable atomic systems. Furthermore, we determine the energies of proposed frequency standards in Hf12+ and W14+.

Original languageEnglish
Article number150801
Number of pages6
JournalPhysical Review Letters
Volume114
Issue number15
Publication statusPublished - 16-Apr-2015
Externally publishedYes

    Keywords

  • HIGHLY-CHARGED IONS, MANY-ELECTRON ATOMS, CRYOGENIC PAUL TRAP, GAUSSIAN-BASIS SET, CLOCKS

ID: 31137210