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Free keywords:
Trapped ions, Magnetic moment, Cyclotron resonance, Electron spin resonance, Penning traps, RF, microwave, terahertz sources
MPINP:
Präzisionsexperimente - Abteilung Blaum
MPINP:
Expt. ALPHATRAP - Abteilung Blaum
MPINP:
Expt. PENTATRAP - Abteilung Blaum
Abstract:
We present the measurements of individual bound electron g factors of 20Ne9+ and 22Ne9+ on the relative level of 0.1 parts per billion. The comparison with theory represents the most stringent test of bound-state QED in strong electric fields. A dedicated mass measurement results in m(20Ne)=19.992 440 168 77(9) u, which improves the current literature value by a factor of 18, disagrees by 4 standard deviations, and represents the most precisely measured mass value in atomic mass units. Together, these measurements yield an electron mass on the relative level of 0.1 ppb with me=5.485 799 090 99(59)×10−4 u as well as a factor of seven improved m(22Ne)=21.991 385 098 2(26) u.
