Explanation

nuclear magnetic resonance is an important method for analyzing the structure of matter. Specifically, the precession motion of the nuclear magnetic moment is subjected to a constant magnetic field and a high-frequency magnetic field is applied in a direction perpendicular to the constant magnetic field. When the precession frequency of the nuclear magnetic moment is equal to the frequency of the high-frequency magnetic field, the nuclear magnetic moment system will absorb energy from the high-frequency electromagnetic field. This process can be used to analyze the properties and structure of substances. nuclear magnetic resonance spectroscopy is a record of the energy absorption of high-frequency electromagnetic fields by atomic nuclei under a constant magnetic field as a function of frequency. It provides important information about material structure, including spectral line shift, relaxation time and spectral structure (multiple resonance peaks) and other parameters.

Classification