Abstract
Single electrons and positrons have been alternately isolated in the same compensated Penning trap in order to form the geonium pseudoatom under nearly identical conditions. For each, the g-factor anomaly is obtained by measurement of both the spin-cyclotron difference frequency and the cyclotron frequency. A search for systematic effects uncovered a small (but common) residual shift due to the cyclotron excitation field. Extrapolation to zero power yields and g factors with a smaller statistical error and a new particle-antiparticle comparison: g()/ g()=1+(0.5±2.1)×. . AE
- Received 23 March 1987
DOI:https://doi.org/10.1103/PhysRevLett.59.26
©1987 American Physical Society