Measurement of the g Factor of the Bound Electron in Hydrogen-like Oxygen 16 O 7 (original) (raw)
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Measurement of the gJ factor of a bound electron in hydrogen-like oxygen 16O7
Canadian Journal of Physics, 2002
The magnetic moment of the electron bound in hydrogen-like oxygen O · has been determined using the "continuous Stern-Gerlach-effect" in a double Penning trap. We obtained a relative precision of ¾ ¢ ½¼ . This tests calculations of bound state-quantum electrodynamics and nuclear correction.
Electronic g Factor of Hydrogenlike Oxygen 16O7
Physical Review Letters, 2004
We present an experimental value for the g factor of the electron bound in hydrogenlike oxygen, which is found to be g expt 2:000 047 025 4 1544. The experiment was performed on a single 16 O 7 ion stored in a Penning trap. For the first time, the expected line shape of the g-factor resonance is calculated which is essential for minimizing the systematic uncertainties. The measurement agrees within 1:1 with the predicted theoretical value g theory 2:000 047 020 2 6. It represents a stringent test of bound-state quantum electrodynamics to a 0.25% level. Assuming the validity of the underlying theory, a value for the electron mass is obtained: m e 0:000 548 579 909 6 4 u. This value agrees with our earlier determination on 12 C 5 and allows a combination of both values which is about 4 times more precise than the currently accepted one.
Electronic g Factor of Hydrogenlike Oxygen O7+16
Physical Review Letters, 2004
We present an experimental value for the g factor of the electron bound in hydrogenlike oxygen, which is found to be g expt 2:000 047 025 4 1544. The experiment was performed on a single 16 O 7 ion stored in a Penning trap. For the first time, the expected line shape of the g-factor resonance is calculated which is essential for minimizing the systematic uncertainties. The measurement agrees within 1:1 with the predicted theoretical value g theory 2:000 047 020 2 6. It represents a stringent test of bound-state quantum electrodynamics to a 0.25% level. Assuming the validity of the underlying theory, a value for the electron mass is obtained: m e 0:000 548 579 909 6 4 u. This value agrees with our earlier determination on 12 C 5 and allows a combination of both values which is about 4 times more precise than the currently accepted one.
Double Penning trap technique for precise g factor determinations in highly charged ions
European Physical Journal D, 2003
We present a detailed description of an experiment to determine the magnetic moment of an electron bound in hydrogen-like carbon. This forms a high-accuracy test of bound-state quantum electrodynamics. Special emphasis is given to the discussion of systematic uncertainties which limit our present accuracy. The described experimental setup may also be used for the determination of g factors in other highly charged ions.
The anomalous magnetic moment of the electron in hydrogenlike ions
The European Physical Journal Special Topics, 2008
The precise determination of the anomalous magnetic moment of the electron bound in hydrogen-like ions allows for a stringent test of quantum electrodynamics (QED) in the presence of strong electric fields. g-factor measurements on the electron bound in hydrogen-like ions 12 C 5+ and 16 O 7+ , using single ions confined in a Penning trap, have yielded values in agreement with theory on the ppb level. If the QED calculations are considered correct, the results can in turn be used for a determination of fundamental constants like the electron mass m e, the fine structure constant α or nuclear parameters. We report about present developments towards g-factor measurements also in medium-heavy and heavy highly-charged ions.
European Physical Journal A, 2002
We describe a double-Penning-trap experiment suitable for testing QED in strong fields by determining the electronic g-factor of a single hydrogen-like ion in its ground state. Our measurements on 12 C 5+ reach a relative accuracy of 2 × 10 −9 , where the largest uncertainty results from the mass of the electron. Together with equally precise theoretical predictions therefore, it is possible to evaluate a new value for the electron's mass. The possibilities to obtain other fundamental constants and nuclear parameters are lined out.
Physical Review Letters, 2000
We present a new experimental value for the magnetic moment of the electron bound in hydrogenlike carbon ͑ 12 C 51 ͒: g exp 2.001 041 596 ͑5͒. This is the most precise determination of an atomic g J factor so far. The experiment was carried out on a single 12 C 51 ion stored in a Penning trap. The high accuracy was made possible by spatially separating the induction of spin flips and the analysis of the spin direction. The current theoretical value amounts to g th 2.001 041 591 ͑7͒. Together experiment and theory test the bound-state QED contributions to the g J factor of a bound electron to a precision of 1%.
Direct Bound-Electron ggg factor Difference Measurement with Coupled Ions
2022
The quantum electrodynamic (QED) description of light-and-matter interaction is one of the most fundamental theories of physics and has been shown to be in excellent agreement with experimental results [1–6]. Specifically, measurements of the electronic magnetic moment (or g factor) of highly charged ions (HCI) in Penning traps can provide a stringent probe for QED, testing the Standard model in the strongest electromagnetic fields [7]. When studying the difference of isotopes, even the intricate effects stemming from the nucleus can be resolved and tested as, due to the identical electron configuration, many common QED contributions do not have to be considered. Experimentally however, this becomes quickly limited, particularly by the precision of the ion masses or the achievable magnetic field stability [8]. Here we report on a novel measurement technique that overcomes both of these limitations by cotrapping two HCIs in a Penning trap and measuring the difference of their g facto...
Observation of the Continuous Stern-Gerlach Effect on an Electron Bound in an Atomic Ion
Physical Review Letters, 2000
We report on the first observation of the continuous Stern-Gerlach effect on an electron bound in an atomic ion. The measurement was performed on a single hydrogenlike ion (12 C 51) in a Penning trap. The measured g factor of the bound electron, g 2.001 042͑2͒, is in excellent agreement with the theoretical value, confirming the relativistic correction at a level of 0.1%. This proves the possibility of g-factor determinations on atomic ions to high precision by using the continuous Stern-Gerlach effect. The result demonstrates the feasibility of conducting experiments on single heavy highly charged ions to test quantum electrodynamics in the strong electric field of the nucleus.
Physical Review A, 2013
We present an experimental concept and setup for laser-microwave double-resonance spectroscopy of highly charged ions in a Penning trap. Such spectroscopy allows a highly precise measurement of the Zeeman splittings of fine-and hyperfine-structure levels due the magnetic field of the trap. We have performed detailed calculations of the Zeeman effect in the framework of quantum electrodynamics of bound states as present in such highly charged ions. We find that apart from the linear Zeeman effect, second-and third-order Zeeman effects also contribute to the splittings on a level of 10 −4 and 10 −8 , respectively, and hence are accessible to a determination within the achievable spectroscopic resolution of the ARTEMIS experiment currently in preparation.