Ultracold Neutrons May Refine Electric‐Dipole‐Moment Value

A group from the Joint Institute for Nuclear Research at Dubna, F. L. Shapiro, V. I. Lushchikov, Yu. N. Pokotilovskii and A. V. Strelkov, has trapped very low energy $(10−7 eV)$ neutrons that could be used for sensitive electric‐dipole‐moment experiments. Because these ultracold neutrons have low velocities, they are present for a relatively long time in an experiment chamber and are thus more susceptible to effects than are faster particles.