Hyperfine Interactions

, Volume 108, Issue 1–3, pp 207–218 | Cite as

High-accuracy mass measurements in ion traps and storage rings

  • H.-J. Kluge


High-accuracy mass measurements have recently been performed on radioactive isotopes produced by proton-induced spallation at the on-line isotope separator ISOLDE at CERN and by heavy-ion projectile fragmentation at the fragment separator FRS at GSI. At ISOLDE, singly charged ions were injected into the Penning trap mass spectrometer ISOLTRAP and their masses determined by observing their cyclotron frequencies in the homogeneous magnetic field of the ion trap. At GSI, bare, hydrogen, or helium-like ions were injected into the experimental storage ring ESR, electron-cooled to the same velocity, and their masses determined by observing their revolution frequencies in the ESR. With ISOLTRAP and ESR, resolving power in the range of 4 × 105< = m/Δ m(FWHM)< = 107 and an accuracy up to \delta m/m~ 10-7 were achieved for radioactive isotopes. Mass measurements of highly charged ions of stable isotopes were performed at Stockholm by use of SMILETRAP. In this case, a resolving power of about 108 and an accuracy close to 10-9 were obtained.


Cyclotron Frequency Paul Trap Fourier Transform Mass Spectrometry Reference Isotope Revolution Frequency 
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Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  • H.-J. Kluge
    • 1
    • 2
  1. 1.Gesellschaft für Schwerionenforschung (GSI)DarmstadtGermany
  2. 2.Physikalisches InstitutUniversität HeidelbergHeidelbergGermany

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