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The \(\mathsf{g_{\scriptscriptstyle J}}\)-factor in the ground state of Ca \(^\mathsf{+}\)

  • G. Tommaseo
  • T. Pfeil
  • G. Revalde
  • G. Werth
  • P. Indelicato
  • J. P. Desclaux
OriginalPaper

Abstract.

We have determined the \(g_{\scriptscriptstyle J}\)-factor of the Ca + ion in the electronic 4S1/2 ground state on a cloud of ions confined in a Penning trap with a superimposed magnetic field of 1.43 T. We use a c.w. laser to prepare a Zeeman substate by optical pumping and induce \(\Delta m_J=1\) transitions by a resonant microwave field at 40 GHz. Resonance is detected by a change in the fluorescence intensity originating from the ion cloud. We obtain a full width in the resonance of a few kHz and the fractional uncertainty of the line center, taking the average of several measurements, was 4 x 10-8. After calibrating the magnetic field by the cyclotron frequency of electrons stored in the same trap we obtain as result \(g_{\scriptscriptstyle J}=2.002 256 64(9)\). The result is supported by a relativistic Multi-Configurational Dirac-Fock calculation.

Keywords

Magnetic Field Microwave Fluorescence Intensity Full Width Line Center 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin/Heidelberg 2003

Authors and Affiliations

  • G. Tommaseo
    • 1
  • T. Pfeil
    • 1
  • G. Revalde
    • 2
  • G. Werth
    • 1
  • P. Indelicato
    • 3
  • J. P. Desclaux
    • 4
  1. 1.Johannes Gutenberg UniversitätInstitut für PhysikMainzGermany
  2. 2.Institute of Atomic Physics and SpectroscopyUniversity of LatviaRigaLatvia
  3. 3.Laboratoire Kastler BrosselÉcole Normal Supérieure et Université Pierre et Marie Curie, Case 74ParisFrance
  4. 4.Private AdresseSassenageFrance

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