Precision spectroscopy of trapped radioactive radium ions

G. S. Giri*, O. O. Versolato, L. W. Wansbeek, J. E. van den Berg, D. J. van der Hoek, K. Jungmann, W. L. Kruithof, C. J. G. Onderwater, B. K. Sahoo, B. Santra, P. D. Shidling, R. G. E. Timmermans, L. Willmann, H. W. Wilschut

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)

Abstract

Atomic parity violation (APV) can be measured in a single Ra(+) ion, enabling a precise measurement of the electroweak mixing angle in the Standard Model of particle physics at low momentum transfer. This provides sensitivity to new particles such as extra Z(0) bosons or leptoquarks. The Weinberg angle can be measured via a determination of the light shift in the forbidden 7(2)S(1/2)-6(2)D(3/2) transition in a single trapped Ra(+). Ultra-narrow transitions in such an ideal system can also be exploited to realize a high stability frequency standard. At the TRI mu P facility of KVI, we have succeeded in the production of a series of radioactive short-lived radium isotopes. The radium isotopes produced were stopped and thermalized to Ra(+) in a thermal ionizer, mass separated in a Wien filter, cooled in a gas filled radio frequency quadrupole and subsequently trapped as a cloud in a linear Paul trap. Laser spectroscopy in the trapped radium ions has been performed. The results of hyperfine structure, isotope shift, and lifetime measurements are important experimental inputs to test the accuracy of atomic theory, the precision of which is indispensable for extracting the Weinberg angle. These results are also of relevance for a possible atomic clock, based on trapped Ra(+).

Original languageEnglish
Pages (from-to)69-72
Number of pages4
JournalCanadian Journal of Physics
Volume89
Issue number1
DOIs
Publication statusPublished - Jan-2011
EventInternational Conference on Precision Physics of Simple Atomic Systems - , France
Duration: 30-May-20104-Jun-2010

Keywords

  • TRI-MU-P
  • PARITY NONCONSERVATION
  • CESIUM

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