TY - JOUR
T1 - New measurement of the electron magnetic moment and the fine structure constant
AU - Hanneke, D.
AU - Fogwell, S.
AU - Gabrielse, G.
PY - 2008/3/26
Y1 - 2008/3/26
N2 - A measurement using a one-electron quantum cyclotron gives the electron magnetic moment in Bohr magnetons, g/2=1.00115965218073(28) [0.28 ppt], with an uncertainty 2.7 and 15 times smaller than for previous measurements in 2006 and 1987. The electron is used as a magnetometer to allow line shape statistics to accumulate, and its spontaneous emission rate determines the correction for its interaction with a cylindrical trap cavity. The new measurement and QED theory determine the fine structure constant, with α-1=137.035999084(51) [0.37 ppb], and an uncertainty 20 times smaller than for any independent determination of α.
AB - A measurement using a one-electron quantum cyclotron gives the electron magnetic moment in Bohr magnetons, g/2=1.00115965218073(28) [0.28 ppt], with an uncertainty 2.7 and 15 times smaller than for previous measurements in 2006 and 1987. The electron is used as a magnetometer to allow line shape statistics to accumulate, and its spontaneous emission rate determines the correction for its interaction with a cylindrical trap cavity. The new measurement and QED theory determine the fine structure constant, with α-1=137.035999084(51) [0.37 ppb], and an uncertainty 20 times smaller than for any independent determination of α.
UR - http://www.scopus.com/inward/record.url?scp=41549093278&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=41549093278&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.100.120801
DO - 10.1103/PhysRevLett.100.120801
M3 - Article
C2 - 18517850
AN - SCOPUS:41549093278
SN - 0031-9007
VL - 100
JO - Physical review letters
JF - Physical review letters
IS - 12
M1 - 120801
ER -