Method of viewing nuclear magnetic resonance

摘要

A method of viewing nuclear magnetic resonance, wherein a test sample is immersed into a unidirectional polarizing magnetic field and subjected to the effect of a radio-frequency magnetic field directed at a perpendicular to the unidirectional polarizing magnetic field. The amplitude of the radio-frequency magnetic field is selected so as to exceed the average local magnetic field set by the gyromagnetic nuclei of the test sample, and the component of magnetization of the test sample longitudinal to the unidirectional polarizing magnetic field is viewed at a frequency of nuclear magnetic resonance in an effective magnetic field in a frame of reference rotating about the sense of the unidirectional polarizing magnetic field at a frequency of the above radio-frequency magnetic field in the direction of natural Larmor precession of the gyromagnetic nuclei in the test sample. The method makes it possible to appreciably increase the resolution of nuclear magnetic resonance in solids and to obtain valuable information on chemical bonds, electron-nuclear interactions and other intrinsic properties of substance.