Fundamentals of Fluid Flow in Porous Media
Diffusion Coefficient: Measurement Techniques
NMR Method: Principles of NMR and Processing
T1 Longitudinal Relaxation Time
As the protons absorbed energy from B1, lift up to the high-energy state during T1 relaxation, any given spin can return to the ground state only by dissipating excess energy to the surrounding (lattice) (Figure 3‑13). Therefore this process also called spin-lattice relaxation. During the T1 time the z-component of M returns to 63% of its original value.
Figure 3-13: Net Magnetization Return to Equilibrium by Turning Off the B1, (The Arrow Represents Net Magnetization)