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g Factor of lithiumlike silicon 28Si11+
Physical Review Letters
|February 5, 2013
Summary
The g factor of lithiumlike silicon (28)Si(11+) was precisely measured using a triple-Penning trap. This experimental result strongly validates advanced quantum electrodynamics theories and relativistic calculations.
Area of Science:
- Atomic Physics
- Quantum Electrodynamics (QED)
- High-Precision Measurements
Background:
- The g factor of light hydrogenlike and heliumlike ions is a sensitive probe of fundamental physics.
- Previous measurements and theoretical calculations for lithiumlike ions have reached high precision, but further tests are needed.
Purpose of the Study:
- To experimentally determine the g factor of lithiumlike silicon ((28)Si(11+)) with high accuracy.
- To provide a stringent test of bound-state quantum electrodynamics (QED) and relativistic many-electron calculations.
Main Methods:
- Measurement of the g factor using a high-precision triple-Penning trap.
- Theoretical calculation incorporating the first rigorous evaluation of the two-photon exchange correction.
Main Results:
- The experimental g factor of lithiumlike silicon was measured to be g(exp)=2.000 889 889 9(21) with a relative uncertainty of 1.1×10(-9).
- The theoretical prediction improved to g(th)=2.000 889 909(51) with an accuracy of 2.5×10(-8).
- Excellent agreement was found between experimental and theoretical values.
Conclusions:
- The results represent the most stringent test of bound-state QED for the g factor of the 1s(2)2s state to date.
- The findings validate relativistic many-electron calculations in a magnetic field.
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