Separated oscillatory fields for high-precision Penning trap mass spectrometry

George, S.; Baruah, S.; Blank, B.; Blaum, K.; Breitenfeldt, M.; Hager, U.; Herfurth, F.; Herlert, A.; Kellerbauer, A.; Kluge, H.-J.

doi:10.1103/PhysRevLett.98.162501

Separated oscillatory fields for high-precision Penning trap mass spectrometry

Jan, 2007

5 pages

Published in:

Phys.Rev.Lett. 98 (2007) 162501

e-Print:

nucl-ex/0701027 [nucl-ex]

DOI:

10.1103/PhysRevLett.98.162501

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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. The theoretical description of the extracted ion-cyclotron-resonance line shape is derived out and its correctness demonstrated experimentally by measuring the mass of the short-lived

^{38}

Ca nuclide with an uncertainty of

1.6\cdot 10^{-8}

using the ISOLTRAP Penning trap mass spectrometer at CERN. The mass value of the superallowed beta-emitter

^{38}

Ca is an important contribution for testing the conserved-vector-current hypothesis of the electroweak interaction. It is shown that the Ramsey method applied to mass measurements yields a statistical uncertainty similar to that obtained by the conventional technique ten times faster.

21.10.Dr
32.10.Bi
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References(25)

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