Search for Anomalous Spin-Dependent Forces Using Stored-Ion Spectroscopy

Author :D. J. Wineland, J. J. Bollinger, D. J. Heinzen, W. M. Itano, and M. G. Raizen
Publication :Physical Review Letters
Volume :67
Number :13
Pages :1735-1738
Year :1991

Resonances in atomic ions can be used to search for new, weak, spin-dependent interactions. Upper limits on anomalous dipole-monopole and dipole-dipole couplings for the neutron and electron are determined by examining hyperfine resonances in stored 9Be+ ions. These experiments also place strict limits on anomalous weights of spinning gyroscopes.