Electron spin energy

When an electron is placed in a magnetic field, the degeneracy of the electron spin energy levels is lifted as shown in Figure 1.1 and as described by the spin Hamiltonian. ... 

Figure 2.1 Splitting pattern for one of the electron spin energy levels coupled to four equivalent protons. Note that the degeneracies of the levels are not shown. See Section 2.5 for details.

Fig. 6.1. Electronic spin energy levels for dimetallic systems Vi-Xh, V2-I, Vi-Vi, and 1-1...

Anisotropy in g values results from the contribution of orbital angular momentum to electron spin energy levels, which can provide valuable information on the orbitals involved.From the point of view of ENDOR spectroscopy, g value anisotropy provides a mechanism whereby a powder pattern EPR signal can provide orientational information. 

Ti Spin-lattice Time constant for equilibration of populations between two electron spin energy levels. Released energy is absorbed by lattice... 

Figure 23.1 Schematic representation of the splitting of electron spin energy level due to the Zeeman effect. The gray background blur represents the uncertainty of energy levels due to the Heisenberg uncertainty principle Ae At > ft/2.

If a proton is situated near the unpaired spin (at the broken site of a molecule), each electron Zeeman energy state will split into two (for nuclear spin I = f2) or three (for nuclear spin 1=1) states. For each nuclear spin, electron spin energy level splits into 21+1 levels. The magnetic field positions of the resonance lines for I = 1 are given by... 

---