Electronic g factor of hydrogenlike oxygen 16O7+.
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 (15)(44). The experiment was performed on a single 16O7+ 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 sigma 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 and allows a combination of both values which is about 4 times more precise than the currently accepted one.
Verdú
J
J
Institut für Physik, Johannes-Gutenberg-Universität, D-55099 Mainz, Germany.
Djekić
S
S
Stahl
S
S
Valenzuela
T
T
Vogel
M
M
Werth
G
G
Beier
T
T
Kluge
H-J
HJ
Quint
W
W