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Ramsey Method of Separated Oscillatory Fields for High-Precision Penning Trap Mass Spectrometry

Abstract : Ramsey's method of separated oscillatory fields is applied to the excitation of the cyclotron motion of short-lived ions in a Penning trap to improve the precision of their measured mass values. The theoretical description of the extracted ion-cyclotron-resonance line shape is derived and its correctness demonstrated experimentally by measuring the mass of the short-lived 38Ca nuclide with an uncertainty of 1.1×10-8 using the Penning trap mass spectrometer ISOLTRAP at CERN. The mass of the superallowed beta emitter 38Ca contributes for testing the theoretical corrections of the conserved-vector-current hypothesis of the electroweak interaction. It is shown that the Ramsey method applied to Penning trap mass measurements yields a statistical uncertainty similar to that obtained by the conventional technique but 10 times faster. Thus the technique is a new powerful tool for high-precision mass measurements.
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http://hal.in2p3.fr/in2p3-00153578
Contributor : Dominique Girod <>
Submitted on : Monday, June 11, 2007 - 1:46:04 PM
Last modification on : Wednesday, September 16, 2020 - 4:17:32 PM

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S. George, S. Baruah, B. Blank, K. Blaum, M. Breitenfeldt, et al.. Ramsey Method of Separated Oscillatory Fields for High-Precision Penning Trap Mass Spectrometry. Physical Review Letters, American Physical Society, 2007, 98, pp.162501. ⟨10.1103/PhysRevLett.98.162501⟩. ⟨in2p3-00153578⟩

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