Coherent Neutron Scattering Amplitudes of Krypton and Xenon, and the Electron-Neutron Interaction

The coherent scattering amplitudes of krypton and xenon for thermal neutrons have been measured by a comparison method involving reflection of a neutron beam from liquid mirrors. The results were (7.68±0.19)×${10}^{-13\mathrm{}}$ cm for krypton and (5.10±0.17)×${10}^{-13\mathrm{}}$ cm for xenon. When these results are used with the scattering measurements of Hamermesh, Ringo, and Wattenberg, one obtains (3900±800) ev for the electron-neutron interaction.