2004
DOI: 10.1126/science.1092320
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An Ion Balance for Ultra-High-Precision Atomic Mass Measurements

Abstract: We have developed the analog of a double-pan balance for determining the masses of single molecular ions from the ratio of their two cyclotron frequencies. By confining two different ions on the same magnetron orbit in a Penning trap, we balance out many sources of noise and error (such as fluctuations of the magnetic field). To minimize the systematic error associated with the Coulomb interaction between the two ions, they are kept about 1 millimeter apart from each other, resulting in fractional uncertainty … Show more

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Cited by 126 publications
(116 citation statements)
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“…However, modern mass comparison techniques using ions trapped in Penning traps can achieve the required sensitivity [25]. It would be interesting, for example, to confirm that the inertial mass of a polar molecule such as lithium hydride is independent of its orientation.…”
Section: A Longitudinal Dipole: Resolution Of Mass Paradoxmentioning
confidence: 99%
“…However, modern mass comparison techniques using ions trapped in Penning traps can achieve the required sensitivity [25]. It would be interesting, for example, to confirm that the inertial mass of a polar molecule such as lithium hydride is independent of its orientation.…”
Section: A Longitudinal Dipole: Resolution Of Mass Paradoxmentioning
confidence: 99%
“…[19][20]. All three constraint equations are then linear in the scaled potentials V 1 , V 2 , and V 3 , yielding single-valued solutions for a givenz 0 ,ρ 2 , and ρ 3 .…”
Section: Previous Three-gap Trapsmentioning
confidence: 99%
“…On the atomic scale, to our knowledge, atomic masses also have the delicious character of universality. Very high precision is attainable with ion traps in comparing atomic, more properly ionic, masses, and 10 and 11 digits are achievable for their ratios [3,4]. However, there is still the problem of knowing the magnetic field if we wish to know the moments and masses in SI units.…”
Section: Introductionmentioning
confidence: 99%