Accuracy studies with carbon clusters at the Penning trap mass spectrometer TRIGA-TRAP
Extensive cross-reference measurements of well-known frequency ratios using various sizes of carbon cluster ions 12 C n + (10≤n≤23) were performed to determine the effects limiting the accuracy of mass measurements at the Penning-trap facility TRIGA-TRAP. Two major contributions to the uncertainty o...
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Published in | The European physical journal. D, Atomic, molecular, and optical physics Vol. 58; no. 1; pp. 47 - 52 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Berlin/Heidelberg
Springer-Verlag
01.05.2010
EDP Sciences |
Subjects | |
Online Access | Get full text |
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Summary: | Extensive cross-reference measurements of well-known frequency ratios using various sizes of carbon cluster ions
12
C
n
+
(10≤n≤23) were performed to determine the effects limiting the accuracy of mass measurements at the Penning-trap facility TRIGA-TRAP. Two major contributions to the uncertainty of a mass measurement have been identified. Fluctuations of the magnetic field cause an uncertainty in the frequency ratio due to the required calibration by a reference ion of u
f
(ν
ref
)/ν
ref
= 6(2) × 10
-11
/min × Δt. A mass-dependent systematic shift of the frequency ratio of epsilon
m
(r)/r = -2.2(2) × 10
-9
× (m-m
ref
)/u has been found as well. Finally, the nuclide
197
Au was used as a cross-check since its mass is already known with an uncertainty of 0.6 keV. |
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ISSN: | 1434-6060 1434-6079 |
DOI: | 10.1140/epjd/e2010-00092-9 |