Search for electric dipole moment in 129Xe atom using active nuclear spin maser

An experimental search for an electric dipole moment in the diamagnetic atom 129 Xe is in progress through the precision measurement of spin precession frequency using an active nuclear spin maser. A 3 He comagnetometer has been incorporated into the active spin maser system in order to cancel out the long-term drifts in the external magnetic field. Also, a double-cell geometry has been adopted in order to suppress the frequency shifts due to interaction with polarized Rb atoms. The first EDM measurement with the 129 Xe active spin maser and the 3 He comagnetometer has been conducted.