Polarization of Li Nuclei in Irradiated LiH

Abstract

The electron spin resonance in colloidal lithium metal produced in ultraviolet-irradiated LiH has been investigated at room temperature. The "Overhauser shift" of the electron resonance frequency due to nuclear polarization may be observed. By an electron-nuclear double resonance experiment it is shown that the polarization of the metallic lithium nuclei probably causes polarization of the lithium in the neighboring nonmetallic regions, i.e., the nonmetallic nuclei are in thermal contact with the nuclei in the metal, and tend to come to the same spin temperature.