Experimental Limit to the Electric Dipole Moment of the Neutron

作者：J.H. Smith, Edward M. Purcell, Norman F. Ramsey · 发表于：Physical Review · 年份：1957 · DOI：10.1103/physrev.108.120 · 被引用次数：240 · 研究领域：Atomic and Subatomic Physics Research、Nuclear Physics and Applications、Quantum, superfluid, helium dynamics

An experimental measurement of the electric dipole moment of the neutron by a neutron-beam magnetic resonance method is described. The result of the experiment is that the electric dipole moment of the neutron equals the charge of the electron multiplied by a distance $D=(\ensuremath{-}0.1\ifmmode\pm\else\textpm\fi{}2.4)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}20}$ cm. Consequently, if an electric dipole moment of the neutron exists and is associated with the spin angular momentum, its magnitude almost certainly corresponds to a value of $D$ less than 5\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}20}$ cm.