Interaction of a nuclear magnetic moment with an electron shell

5 Interaction of a nuclear magnetic moment with an electron shell 

In addition to the electrostatic interactions of a nuclear charge with an atomic electron shell, there is also the interaction of a nuclear magnetic moment with a magnetic field created by an electronic shell at the point of nucleus location. Two phenomena appear simultaneously the electron shell creates a magnetic field at the point of nucleus location, and, on the other hand, the nuclear magnetic moment creates a magnetic field influencing the electron cloud. 

The interaction of the nuclear magnetic moment with the electron magnetic field can be described by the Zeeman effect (refer to Section 7.7). The Zeeman splitting in this instance is  

In magnetically disordered materials, as a result of the thermal chaotic motion of atoms, the averaged nuclear magnetic field is zero and the effect is nonobservable. In magnetically ordered materials, the chaotic motion does not occur in full measure and a nuclear Zeeman effect takes place. 

The same happens when the nuclear magnetic moment acts on the atomic electron s shell. This makes it possible to investigate the changes in the shell caused by the chemical interactions. 

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