Electrons and nuclei in magnetic fields

Tabl 13.1 Nuclear constitution and the nuclear spin quantum number 

To understand the principles of EPR and NMR we need to understand the magnetic properties of electrons and nuclei. 

Alternative expression for the energy of an electron in a magnetic field 

A nucleus with nonzero spin also has a magnetic moment cuid behaves hke a tiny mcignet. The orientation of this magnet is determined by the value of mj, cUid in a mcignetic field o the 21+1 orientations of the nucleus have different energies. These energies ue given by 

---