Towards a precise measurement of atomic parity violation in a single Ra+ ion

S. Hoekstra, K. Jungmann, C.J.G. Onderwater, R. G. E. Timmermans, L. Willmann, H. W. Wilschut

Research output: Contribution to journalArticleAcademicpeer-review


A single trapped Ra +  (Z = 88) ion provides a very promising route towards a most precise measurement of Atomic Parity Violation (APV), since APV effects grow faster than Z 3. This experiment promises the best determination of the electroweak coupling constant at the lowest accessible energies. Such a measurement provides a sensitive test of the Standard Model in particle physics. At the present stage of the experiment, we focus on trapping and laser cooling stable Ba +  ions as a precursor for radioactive Ra + . Online laser spectroscopy of the isotopes 209 − 214Ra +  in a linear Paul trap has provided information on transition wavelengths, fine and hyperfine structures and excited state lifetimes as test of atomic structure calculations. Additionaly, a single trapped Ra +  ion could function as a very stable clock.
Original languageEnglish
Pages (from-to)157-162
Number of pages6
JournalHyperfine Interactions
Issue number1
Publication statusPublished - 31 Mar 2013
Externally publishedYes


  • Atomic Parity Violation
  • Radium
  • Laser Spectroscopy
  • Hyperfine Structure
  • Atomic Clock


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