Open AccessRamsey Method of Separated Oscillatory Fields for High-Precision Penning Trap Mass Spectrometry
Author(s) -
S. George,
S. Baruah,
Β. Blank,
K. Blaum,
M. Breitenfeldt,
U. Hager,
F. Herfurth,
A. Herlert,
A. Kellerbauer,
H.-J. Kluge,
Martin Kretzschmar,
D. Lunney,
R. Savreux,
S. Schwarz,
L. Schweikhard,
C. Yazidjian
Publication year - 2007
Publication title -
physical review letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.688
H-Index - 673
eISSN - 1079-7114
pISSN - 0031-9007
DOI - 10.1103/physrevlett.98.162501
Subject(s) - penning trap , physics , ion trap , atomic physics , fourier transform ion cyclotron resonance , cyclotron , mass spectrometry , atomic mass , quadrupole ion trap , electroweak interaction , ion cyclotron resonance , ion , nuclear physics , electron , particle physics , quantum mechanics
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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